38118521 has 24 divisors (see below), whose sum is σ = 46785600. Its totient is φ = 30905952.

The previous prime is 38118491. The next prime is 38118523. The reversal of 38118521 is 12581183.

It is a de Polignac number, because none of the positive numbers 2^k-38118521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38118523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167810 + ... + 168036.

It is an arithmetic number, because the mean of its divisors is an integer number (1949400).

Almost surely, 2^38118521 is an apocalyptic number.

It is an amenable number.

38118521 is a deficient number, since it is larger than the sum of its proper divisors (8667079).

38118521 is a wasteful number, since it uses less digits than its factorization.

38118521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 406 counting only the distinct ones).

The product of its digits is 1920, while the sum is 29.

The square root of 38118521 is about 6174.0198412380. The cubic root of 38118521 is about 336.5467083436.

The spelling of 38118521 in words is "thirty-eight million, one hundred eighteen thousand, five hundred twenty-one".