390705984 has 56 divisors (see below), whose sum is σ = 1148608320. Its totient is φ = 130234752.

The previous prime is 390705941. The next prime is 390706003. The reversal of 390705984 is 489507093.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 111324 + ... + 114779.

Almost surely, 2^390705984 is an apocalyptic number.

It is an amenable number.

390705984 is an abundant number, since it is smaller than the sum of its proper divisors (757902336).

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

390705984 is a wasteful number, since it uses less digits than its factorization.

390705984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226124 (or 226108 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 390705984 is about 19766.2840210293. The cubic root of 390705984 is about 731.0549481084.

It can be divided in two parts, 39070 and 5984, that added together give a palindrome (45054).

The spelling of 390705984 in words is "three hundred ninety million, seven hundred five thousand, nine hundred eighty-four".