397390760 has 64 divisors (see below), whose sum is σ = 965260800. Its totient is φ = 146370816.

The previous prime is 397390739. The next prime is 397390787. The reversal of 397390760 is 67093793.

It is a super-2 number, since 2×397390760² = 315838832266755200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315011 + ... + 316269.

It is an arithmetic number, because the mean of its divisors is an integer number (15082200).

Almost surely, 2^397390760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397390760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482630400).

397390760 is an abundant number, since it is smaller than the sum of its proper divisors (567870040).

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

397390760 is a wasteful number, since it uses less digits than its factorization.

397390760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 44.

The square root of 397390760 is about 19934.6622745408. The cubic root of 397390760 is about 735.2007164662.

The spelling of 397390760 in words is "three hundred ninety-seven million, three hundred ninety thousand, seven hundred sixty".