390405552 has 20 divisors (see below), whose sum is σ = 1008547800. Its totient is φ = 130135168.

The previous prime is 390405541. The next prime is 390405553. The reversal of 390405552 is 255504093.

It is not an unprimeable number, because it can be changed into a prime (390405553) 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, 4066677 + ... + 4066772.

It is an arithmetic number, because the mean of its divisors is an integer number (50427390).

Almost surely, 2^390405552 is an apocalyptic number.

It is an amenable number.

390405552 is an abundant number, since it is smaller than the sum of its proper divisors (618142248).

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

390405552 is a wasteful number, since it uses less digits than its factorization.

390405552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133460 (or 8133454 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 390405552 is about 19758.6829520593. The cubic root of 390405552 is about 730.8675193441.

The spelling of 390405552 in words is "three hundred ninety million, four hundred five thousand, five hundred fifty-two".