397437716 has 12 divisors (see below), whose sum is σ = 749017332. Its totient is φ = 183432768.

The previous prime is 397437673. The next prime is 397437743. The reversal of 397437716 is 617734793.

It can be written as a sum of positive squares in 2 ways, for example, as 92236816 + 305200900 = 9604^2 + 17470^2 .

It is a super-3 number, since 3×397437716³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3821465 + ... + 3821568.

It is an arithmetic number, because the mean of its divisors is an integer number (62418111).

Almost surely, 2^397437716 is an apocalyptic number.

It is an amenable number.

397437716 is a deficient number, since it is larger than the sum of its proper divisors (351579616).

397437716 is a wasteful number, since it uses less digits than its factorization.

397437716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643050 (or 7643048 counting only the distinct ones).

The product of its digits is 666792, while the sum is 47.

The square root of 397437716 is about 19935.8399873193. The cubic root of 397437716 is about 735.2296726211.

The spelling of 397437716 in words is "three hundred ninety-seven million, four hundred thirty-seven thousand, seven hundred sixteen".