390391560 has 96 divisors (see below), whose sum is σ = 1366386840. Its totient is φ = 96095232.

The previous prime is 390391559. The next prime is 390391577. The reversal of 390391560 is 65193093.

390391560 is a `hidden beast` number, since 3 + 9 + 0 + 3 + 91 + 560 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 142706916 + 247684644 = 11946^2 + 15738^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37029 + ... + 46388.

Almost surely, 2^390391560 is an apocalyptic number.

390391560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

390391560 is an abundant number, since it is smaller than the sum of its proper divisors (975995280).

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

390391560 is a wasteful number, since it uses less digits than its factorization.

390391560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83447 (or 83440 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 390391560 is about 19758.3288767041. The cubic root of 390391560 is about 730.8587878934.

The spelling of 390391560 in words is "three hundred ninety million, three hundred ninety-one thousand, five hundred sixty".