38390923515 has 48 divisors (see below), whose sum is σ = 71607773952. Its totient is φ = 17512399296.

The previous prime is 38390923457. The next prime is 38390923517. The reversal of 38390923515 is 51532909383.

It is not a de Polignac number, because 38390923515 - 2¹³ = 38390915323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38390923517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287322 + ... + 399168.

It is an arithmetic number, because the mean of its divisors is an integer number (1491828624).

Almost surely, 2^38390923515 is an apocalyptic number.

38390923515 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38390923515 is a deficient number, since it is larger than the sum of its proper divisors (33216850437).

38390923515 is a wasteful number, since it uses less digits than its factorization.

38390923515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112336 (or 112329 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 38390923515 in words is "thirty-eight billion, three hundred ninety million, nine hundred twenty-three thousand, five hundred fifteen".