39515490 has 48 divisors (see below), whose sum is σ = 117419328. Its totient is φ = 9031968.

The previous prime is 39515453. The next prime is 39515491. The reversal of 39515490 is 9451593.

It is a super-2 number, since 2×39515490² = 3122947899880200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39515491) 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, 30732 + ... + 31991.

It is an arithmetic number, because the mean of its divisors is an integer number (2446236).

Almost surely, 2^39515490 is an apocalyptic number.

39515490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39515490 is an abundant number, since it is smaller than the sum of its proper divisors (77903838).

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

39515490 is a wasteful number, since it uses less digits than its factorization.

39515490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62743 (or 62740 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 39515490 is about 6286.1347424312. The cubic root of 39515490 is about 340.6087422030.

The spelling of 39515490 in words is "thirty-nine million, five hundred fifteen thousand, four hundred ninety".