9138407028 has 24 divisors (see below), whose sum is σ = 21405925632. Its totient is φ = 3034281984.

The previous prime is 9138407017. The next prime is 9138407077. The reversal of 9138407028 is 8207048319.

It is a congruent 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, 1478500 + ... + 1484667.

It is an arithmetic number, because the mean of its divisors is an integer number (891913568).

Almost surely, 2^9138407028 is an apocalyptic number.

It is an amenable number.

9138407028 is an abundant number, since it is smaller than the sum of its proper divisors (12267518604).

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

9138407028 is a wasteful number, since it uses less digits than its factorization.

9138407028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963431 (or 2963429 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 9138407028 is about 95595.0157068871. The cubic root of 9138407028 is about 2090.6925223519.

The spelling of 9138407028 in words is "nine billion, one hundred thirty-eight million, four hundred seven thousand, twenty-eight".