120928138 has 4 divisors (see below), whose sum is σ = 181392210. Its totient is φ = 60464068.

The previous prime is 120928097. The next prime is 120928153. The reversal of 120928138 is 831829021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831829021 = 107 ⋅7774103.

It can be written as a sum of positive squares in only one way, i.e., 117137329 + 3790809 = 10823^2 + 1947^2 .

It is a super-2 number, since 2×120928138² = 29247229120294088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30232033 + ... + 30232036.

Almost surely, 2^120928138 is an apocalyptic number.

120928138 is a deficient number, since it is larger than the sum of its proper divisors (60464072).

120928138 is an equidigital number, since it uses as much as digits as its factorization.

120928138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60464071.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 120928138 is about 10996.7330603230. The cubic root of 120928138 is about 494.5108087536.

The spelling of 120928138 in words is "one hundred twenty million, nine hundred twenty-eight thousand, one hundred thirty-eight".