390013890 has 32 divisors (see below), whose sum is σ = 1069752960. Its totient is φ = 89145984.

The previous prime is 390013861. The next prime is 390013927. The reversal of 390013890 is 98310093.

It is a super-2 number, since 2×390013890² = 304221668785864200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928395 + ... + 928814.

It is an arithmetic number, because the mean of its divisors is an integer number (33429780).

Almost surely, 2^390013890 is an apocalyptic number.

390013890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

390013890 is an abundant number, since it is smaller than the sum of its proper divisors (679739070).

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

390013890 is a wasteful number, since it uses less digits than its factorization.

390013890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857226.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 390013890 is about 19748.7693287455. The cubic root of 390013890 is about 730.6230310071.

The spelling of 390013890 in words is "three hundred ninety million, thirteen thousand, eight hundred ninety".