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244071972 = 22326779777
BaseRepresentation
bin11101000110000…
…11111000100100
3122000021010210200
432203003320210
5444440300342
640115150500
76022402044
oct1643037044
9560233720
10244071972
11115854981
12698a5430
133b7483b1
14245b5724
151666294c
hexe8c3e24

244071972 has 18 divisors (see below), whose sum is σ = 616959798. Its totient is φ = 81357312.

The previous prime is 244071953. The next prime is 244071979. The reversal of 244071972 is 279170442.

It can be written as a sum of positive squares in only one way, i.e., 156350016 + 87721956 = 12504^2 + 9366^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2440719722 = 119142255031937568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6779777 = 244071972 / (2 + 4 + 4 + 0 + 7 + 1 + 9 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (244071979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3389853 + ... + 3389924.

Almost surely, 2244071972 is an apocalyptic number.

It is an amenable number.

244071972 is an abundant number, since it is smaller than the sum of its proper divisors (372887826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

244071972 is a wasteful number, since it uses less digits than its factorization.

244071972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779787 (or 6779782 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 244071972 is about 15622.8029495350. The cubic root of 244071972 is about 624.9414106145.

The spelling of 244071972 in words is "two hundred forty-four million, seventy-one thousand, nine hundred seventy-two".

Divisors: 1 2 3 4 6 9 12 18 36 6779777 13559554 20339331 27119108 40678662 61017993 81357324 122035986 244071972