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BaseRepresentation
bin10001010001011…
…00010000001001
3101002121220111200
420220230100021
5244042302440
622213214413
73406333335
oct1050542011
9332556450
10144884745
1174869065
1240631409
132402a825
14153567c5
15cabdc30
hex8a2c409

144884745 has 24 divisors (see below), whose sum is σ = 252088200. Its totient is φ = 76978176.

The previous prime is 144884743. The next prime is 144884807. The reversal of 144884745 is 547488441.

It can be written as a sum of positive squares in 4 ways, for example, as 4888521 + 139996224 = 2211^2 + 11832^2 .

It is not a de Polignac number, because 144884745 - 21 = 144884743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 144884745.

It is not an unprimeable number, because it can be changed into a prime (144884743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6121 + ... + 18089.

It is an arithmetic number, because the mean of its divisors is an integer number (10503675).

Almost surely, 2144884745 is an apocalyptic number.

144884745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144884745 is a deficient number, since it is larger than the sum of its proper divisors (107203455).

144884745 is a wasteful number, since it uses less digits than its factorization.

144884745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12249 (or 12246 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 144884745 is about 12036.8079240304. The cubic root of 144884745 is about 525.2195544283.

The spelling of 144884745 in words is "one hundred forty-four million, eight hundred eighty-four thousand, seven hundred forty-five".