390909696 has 144 divisors (see below), whose sum is σ = 1118476800. Its totient is φ = 120766464.

The previous prime is 390909653. The next prime is 390909731. The reversal of 390909696 is 696909093.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 15 ways as a sum of consecutive naturals, for example, 1031235 + ... + 1031613.

It is an arithmetic number, because the mean of its divisors is an integer number (7767200).

Almost surely, 2^390909696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390909696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559238400).

390909696 is an abundant number, since it is smaller than the sum of its proper divisors (727567104).

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

390909696 is a wasteful number, since it uses less digits than its factorization.

390909696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 51.

The square root of 390909696 is about 19771.4363666376. The cubic root of 390909696 is about 731.1819820729.

The spelling of 390909696 in words is "three hundred ninety million, nine hundred nine thousand, six hundred ninety-six".