38978233518 has 32 divisors (see below), whose sum is σ = 89357508864. Its totient is φ = 11103587712.

The previous prime is 38978233513. The next prime is 38978233531. The reversal of 38978233518 is 81533287983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38978233513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1362780 + ... + 1391087.

It is an arithmetic number, because the mean of its divisors is an integer number (2792422152).

Almost surely, 2^38978233518 is an apocalyptic number.

38978233518 is an abundant number, since it is smaller than the sum of its proper divisors (50379275346).

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

38978233518 is a wasteful number, since it uses less digits than its factorization.

38978233518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754216.

The product of its digits is 8709120, while the sum is 57.

The spelling of 38978233518 in words is "thirty-eight billion, nine hundred seventy-eight million, two hundred thirty-three thousand, five hundred eighteen".