397902292 has 12 divisors (see below), whose sum is σ = 715148980. Its totient is φ = 193574016.

The previous prime is 397902283. The next prime is 397902293. The reversal of 397902292 is 292209793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199261456 + 198640836 = 14116^2 + 14094^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397902293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344117 + ... + 1344412.

Almost surely, 2^397902292 is an apocalyptic number.

It is an amenable number.

397902292 is a deficient number, since it is larger than the sum of its proper divisors (317246688).

397902292 is a wasteful number, since it uses less digits than its factorization.

397902292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688570 (or 2688568 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 397902292 is about 19947.4883632000. The cubic root of 397902292 is about 735.5160378743.

The spelling of 397902292 in words is "three hundred ninety-seven million, nine hundred two thousand, two hundred ninety-two".