120644428 has 6 divisors (see below), whose sum is σ = 211127756. Its totient is φ = 60322212.

The previous prime is 120644413. The next prime is 120644431. The reversal of 120644428 is 824446021.

It is a self number, because there is not a number n which added to its sum of digits gives 120644428.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15080550 + ... + 15080557.

Almost surely, 2^120644428 is an apocalyptic number.

It is an amenable number.

120644428 is a deficient number, since it is larger than the sum of its proper divisors (90483328).

120644428 is a wasteful number, since it uses less digits than its factorization.

120644428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30161111 (or 30161109 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 120644428 is about 10983.8257451582. The cubic root of 120644428 is about 494.1237813153.

The spelling of 120644428 in words is "one hundred twenty million, six hundred forty-four thousand, four hundred twenty-eight".