390775632 has 80 divisors (see below), whose sum is σ = 1090430208. Its totient is φ = 119877120.

The previous prime is 390775631. The next prime is 390775709. The reversal of 390775632 is 236577093.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390775631) by changing a digit.

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, 268218 + ... + 269670.

Almost surely, 2^390775632 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 390775632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545215104).

390775632 is an abundant number, since it is smaller than the sum of its proper divisors (699654576).

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

390775632 is a wasteful number, since it uses less digits than its factorization.

390775632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 42.

The square root of 390775632 is about 19768.0457304206. The cubic root of 390775632 is about 731.0983852811.

The spelling of 390775632 in words is "three hundred ninety million, seven hundred seventy-five thousand, six hundred thirty-two".