38979521 has 8 divisors (see below), whose sum is σ = 47168640. Its totient is φ = 31445568.

The previous prime is 38979517. The next prime is 38979527. The reversal of 38979521 is 12597983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38979521 - 2² = 38979517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38979527) 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, 163661 + ... + 163898.

It is an arithmetic number, because the mean of its divisors is an integer number (5896080).

Almost surely, 2^38979521 is an apocalyptic number.

It is an amenable number.

38979521 is a deficient number, since it is larger than the sum of its proper divisors (8189119).

38979521 is a wasteful number, since it uses less digits than its factorization.

38979521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327583.

The product of its digits is 136080, while the sum is 44.

The square root of 38979521 is about 6243.3581508672. The cubic root of 38979521 is about 339.0617761146.

The spelling of 38979521 in words is "thirty-eight million, nine hundred seventy-nine thousand, five hundred twenty-one".