39390515 has 24 divisors (see below), whose sum is σ = 50566320. Its totient is φ = 29450304.

The previous prime is 39390499. The next prime is 39390517. The reversal of 39390515 is 51509393.

It is not a de Polignac number, because 39390515 - 2⁴ = 39390499 is a prime.

It is a super-2 number, since 2×39390515² = 3103225343930450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39390517) 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, 250817 + ... + 250973.

It is an arithmetic number, because the mean of its divisors is an integer number (2106930).

Almost surely, 2^39390515 is an apocalyptic number.

39390515 is a deficient number, since it is larger than the sum of its proper divisors (11175805).

39390515 is a wasteful number, since it uses less digits than its factorization.

39390515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 39390515 is about 6276.1863420392. The cubic root of 39390515 is about 340.2492837350.

The spelling of 39390515 in words is "thirty-nine million, three hundred ninety thousand, five hundred fifteen".