397703040 has 256 divisors, whose sum is σ = 1466449920. Its totient is φ = 89800704.

The previous prime is 397702979. The next prime is 397703081. The reversal of 397703040 is 40307793.

It is a junction number, because it is equal to n+sod(n) for n = 397702992 and 397703010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1706764 + ... + 1706996.

It is an arithmetic number, because the mean of its divisors is an integer number (5728320).

Almost surely, 2^397703040 is an apocalyptic number.

397703040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397703040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733224960).

397703040 is an abundant number, since it is smaller than the sum of its proper divisors (1068746880).

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

397703040 is a wasteful number, since it uses less digits than its factorization.

397703040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 397703040 is about 19942.4933245570. The cubic root of 397703040 is about 735.3932459948.

The spelling of 397703040 in words is "three hundred ninety-seven million, seven hundred three thousand, forty".