390933040 has 20 divisors (see below), whose sum is σ = 908919504. Its totient is φ = 156373184.

The previous prime is 390933019. The next prime is 390933041. The reversal of 390933040 is 40339093.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 390932993 and 390933011.

It is not an unprimeable number, because it can be changed into a prime (390933041) 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 3 ways as a sum of consecutive naturals, for example, 2443252 + ... + 2443411.

Almost surely, 2^390933040 is an apocalyptic number.

It is an amenable number.

390933040 is an abundant number, since it is smaller than the sum of its proper divisors (517986464).

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

390933040 is a wasteful number, since it uses less digits than its factorization.

390933040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886676 (or 4886670 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 390933040 is about 19772.0267044125. The cubic root of 390933040 is about 731.1965364765.

The spelling of 390933040 in words is "three hundred ninety million, nine hundred thirty-three thousand, forty".