393950920 has 32 divisors (see below), whose sum is σ = 966971520. Its totient is φ = 143254720.

The previous prime is 393950899. The next prime is 393950927. The reversal of 393950920 is 29059393.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (393950927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447232 + ... + 448111.

It is an arithmetic number, because the mean of its divisors is an integer number (30217860).

Almost surely, 2^393950920 is an apocalyptic number.

It is an amenable number.

393950920 is an abundant number, since it is smaller than the sum of its proper divisors (573020600).

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

393950920 is a wasteful number, since it uses less digits than its factorization.

393950920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895365 (or 895361 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 40.

The square root of 393950920 is about 19848.1968954361. The cubic root of 393950920 is about 733.0732512052.

The spelling of 393950920 in words is "three hundred ninety-three million, nine hundred fifty thousand, nine hundred twenty".