397260855988 has 12 divisors (see below), whose sum is σ = 695358954052. Its totient is φ = 198586869120.

The previous prime is 397260855983. The next prime is 397260856009. The reversal of 397260855988 is 889558062793.

It can be written as a sum of positive squares in 2 ways, for example, as 143958018724 + 253302837264 = 379418^2 + 503292^2 .

It is a super-2 number, since 2×397260855988² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397260855983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10869195 + ... + 10905682.

Almost surely, 2^397260855988 is an apocalyptic number.

It is an amenable number.

397260855988 is a deficient number, since it is larger than the sum of its proper divisors (298098098064).

397260855988 is a wasteful number, since it uses less digits than its factorization.

397260855988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21779442 (or 21779440 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 70.

The spelling of 397260855988 in words is "three hundred ninety-seven billion, two hundred sixty million, eight hundred fifty-five thousand, nine hundred eighty-eight".