120638428 has 12 divisors (see below), whose sum is σ = 211215312. Its totient is φ = 60291200.

The previous prime is 120638423. The next prime is 120638431. The reversal of 120638428 is 824836021.

It is a super-2 number, since 2×120638428² = 29107260620622368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120638393 and 120638402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120638423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4953 + ... + 16303.

It is an arithmetic number, because the mean of its divisors is an integer number (17601276).

Almost surely, 2^120638428 is an apocalyptic number.

It is an amenable number.

120638428 is a deficient number, since it is larger than the sum of its proper divisors (90576884).

120638428 is a wasteful number, since it uses less digits than its factorization.

120638428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012 (or 14010 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 120638428 is about 10983.5526128844. The cubic root of 120638428 is about 494.1155897729.

The spelling of 120638428 in words is "one hundred twenty million, six hundred thirty-eight thousand, four hundred twenty-eight".