397705020 has 24 divisors (see below), whose sum is σ = 1113574224. Its totient is φ = 106054656.

The previous prime is 397705019. The next prime is 397705031. The reversal of 397705020 is 20507793.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314149 + ... + 3314268.

It is an arithmetic number, because the mean of its divisors is an integer number (46398926).

Almost surely, 2^397705020 is an apocalyptic number.

397705020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397705020 is an abundant number, since it is smaller than the sum of its proper divisors (715869204).

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

397705020 is a wasteful number, since it uses less digits than its factorization.

397705020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628429 (or 6628427 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 397705020 is about 19942.5429672346. The cubic root of 397705020 is about 735.3944663997.

The spelling of 397705020 in words is "three hundred ninety-seven million, seven hundred five thousand, twenty".