390780528 has 20 divisors (see below), whose sum is σ = 1009516488. Its totient is φ = 130260160.

The previous prime is 390780527. The next prime is 390780563. The reversal of 390780528 is 825087093.

It is a self number, because there is not a number n which added to its sum of digits gives 390780528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390780527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4070583 + ... + 4070678.

Almost surely, 2^390780528 is an apocalyptic number.

It is an amenable number.

390780528 is an abundant number, since it is smaller than the sum of its proper divisors (618735960).

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

390780528 is a wasteful number, since it uses less digits than its factorization.

390780528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8141272 (or 8141266 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 390780528 is about 19768.1695662497. The cubic root of 390780528 is about 731.1014385615.

The spelling of 390780528 in words is "three hundred ninety million, seven hundred eighty thousand, five hundred twenty-eight".