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80084420 = 22513308017
BaseRepresentation
bin1001100010111…
…11110111000100
312120200201011122
410301133313010
5131000200140
611540253112
71661464163
oct461376704
9176621148
1080084420
1141229679
12229a1198
131378c940
14a8c93da
15706dab5
hex4c5fdc4

80084420 has 24 divisors (see below), whose sum is σ = 181114584. Its totient is φ = 29569536.

The previous prime is 80084383. The next prime is 80084423. The reversal of 80084420 is 2448008.

It can be written as a sum of positive squares in 4 ways, for example, as 232324 + 79852096 = 482^2 + 8936^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 80084420.

It is not an unprimeable number, because it can be changed into a prime (80084423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153749 + ... + 154268.

It is an arithmetic number, because the mean of its divisors is an integer number (7546441).

Almost surely, 280084420 is an apocalyptic number.

It is an amenable number.

80084420 is an abundant number, since it is smaller than the sum of its proper divisors (101030164).

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

80084420 is a wasteful number, since it uses less digits than its factorization.

80084420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308039 (or 308037 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 80084420 is about 8948.9898871325. The cubic root of 80084420 is about 431.0384492052.

The spelling of 80084420 in words is "eighty million, eighty-four thousand, four hundred twenty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260 308017 616034 1232068 1540085 3080170 4004221 6160340 8008442 16016884 20021105 40042210 80084420