399015090 has 48 divisors (see below), whose sum is σ = 1038892608. Its totient is φ = 106255008.

The previous prime is 399015079. The next prime is 399015107. The reversal of 399015090 is 90510993.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71377 + ... + 76763.

It is an arithmetic number, because the mean of its divisors is an integer number (21643596).

Almost surely, 2^399015090 is an apocalyptic number.

399015090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

399015090 is an abundant number, since it is smaller than the sum of its proper divisors (639877518).

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

399015090 is a wasteful number, since it uses less digits than its factorization.

399015090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223 (or 6220 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 399015090 is about 19975.3620743154. The cubic root of 399015090 is about 736.2010627921.

The spelling of 399015090 in words is "three hundred ninety-nine million, fifteen thousand, ninety".