390239020 has 48 divisors (see below), whose sum is σ = 837220608. Its totient is φ = 152755200.

The previous prime is 390238997. The next prime is 390239023. The reversal of 390239020 is 20932093.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 390239020.

It is not an unprimeable number, because it can be changed into a prime (390239023) 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, 199045 + ... + 200995.

It is an arithmetic number, because the mean of its divisors is an integer number (17442096).

Almost surely, 2^390239020 is an apocalyptic number.

It is an amenable number.

390239020 is an abundant number, since it is smaller than the sum of its proper divisors (446981588).

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

390239020 is a wasteful number, since it uses less digits than its factorization.

390239020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 390239020 is about 19754.4683552861. The cubic root of 390239020 is about 730.7635845689.

The spelling of 390239020 in words is "three hundred ninety million, two hundred thirty-nine thousand, twenty".