120644872 has 16 divisors (see below), whose sum is σ = 234009900. Its totient is φ = 58242240.

The previous prime is 120644863. The next prime is 120644891. The reversal of 120644872 is 278446021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107205316 + 13439556 = 10354^2 + 3666^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259779 + ... + 260242.

Almost surely, 2^120644872 is an apocalyptic number.

It is an amenable number.

120644872 is a deficient number, since it is larger than the sum of its proper divisors (113365028).

120644872 is a wasteful number, since it uses less digits than its factorization.

120644872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520056 (or 520052 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 120644872 is about 10983.8459566766. The cubic root of 120644872 is about 494.1243874786.

The spelling of 120644872 in words is "one hundred twenty million, six hundred forty-four thousand, eight hundred seventy-two".