390820712 has 24 divisors (see below), whose sum is σ = 740270550. Its totient is φ = 193435200.

The previous prime is 390820711. The next prime is 390820723. The reversal of 390820712 is 217028093.

It can be written as a sum of positive squares in 3 ways, for example, as 389115076 + 1705636 = 19726^2 + 1306^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (390820711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79214 + ... + 84002.

Almost surely, 2^390820712 is an apocalyptic number.

It is an amenable number.

390820712 is a deficient number, since it is larger than the sum of its proper divisors (349449838).

390820712 is a wasteful number, since it uses less digits than its factorization.

390820712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997 (or 4892 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 390820712 is about 19769.1859215295. The cubic root of 390820712 is about 731.1264974468.

The spelling of 390820712 in words is "three hundred ninety million, eight hundred twenty thousand, seven hundred twelve".