928665138 has 16 divisors (see below), whose sum is σ = 1861364736. Its totient is φ = 308882640.

The previous prime is 928665107. The next prime is 928665209. The reversal of 928665138 is 831566829.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165106 + ... + 170637.

It is an arithmetic number, because the mean of its divisors is an integer number (116335296).

Almost surely, 2^928665138 is an apocalyptic number.

928665138 is an abundant number, since it is smaller than the sum of its proper divisors (932699598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

928665138 is a wasteful number, since it uses less digits than its factorization.

928665138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336209.

The product of its digits is 622080, while the sum is 48.

The square root of 928665138 is about 30474.0075802314. The cubic root of 928665138 is about 975.6327737257.

The spelling of 928665138 in words is "nine hundred twenty-eight million, six hundred sixty-five thousand, one hundred thirty-eight".