38390923538 has 16 divisors (see below), whose sum is σ = 62824888224. Its totient is φ = 17449481760.

The previous prime is 38390923531. The next prime is 38390923603. The reversal of 38390923538 is 83532909383.

It is a self number, because there is not a number n which added to its sum of digits gives 38390923538.

It is not an unprimeable number, because it can be changed into a prime (38390923531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528581 + ... + 596807.

It is an arithmetic number, because the mean of its divisors is an integer number (3926555514).

Almost surely, 2^38390923538 is an apocalyptic number.

38390923538 is a deficient number, since it is larger than the sum of its proper divisors (24433964686).

38390923538 is a wasteful number, since it uses less digits than its factorization.

38390923538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93817.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 38390923538 in words is "thirty-eight billion, three hundred ninety million, nine hundred twenty-three thousand, five hundred thirty-eight".