397804183920 has 240 divisors, whose sum is σ = 1569518731872. Its totient is φ = 89019095040.

The previous prime is 397804183867. The next prime is 397804183957. The reversal of 397804183920 is 29381408793.

397804183920 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1828879 + ... + 2034798.

Almost surely, 2^397804183920 is an apocalyptic number.

397804183920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397804183920 is an abundant number, since it is smaller than the sum of its proper divisors (1171714547952).

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

397804183920 is a wasteful number, since it uses less digits than its factorization.

397804183920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863720 (or 3863711 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 397804183920 in words is "three hundred ninety-seven billion, eight hundred four million, one hundred eighty-three thousand, nine hundred twenty".