38731115520 has 440 divisors, whose sum is σ = 141157812048. Its totient is φ = 10152345600.

The previous prime is 38731115509. The next prime is 38731115551. The reversal of 38731115520 is 2551113783.

It is a happy number.

38731115520 is a `hidden beast` number, since 38 + 73 + 1 + 1 + 1 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25297155 + ... + 25298685.

Almost surely, 2^38731115520 is an apocalyptic number.

38731115520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38731115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70578906024).

38731115520 is an abundant number, since it is smaller than the sum of its proper divisors (102426696528).

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

38731115520 is a wasteful number, since it uses less digits than its factorization.

38731115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 38731115520 in words is "thirty-eight billion, seven hundred thirty-one million, one hundred fifteen thousand, five hundred twenty".