397361556 has 18 divisors (see below), whose sum is σ = 1004441802. Its totient is φ = 132453840.

The previous prime is 397361533. The next prime is 397361579. The reversal of 397361556 is 655163793.

397361556 is a `hidden beast` number, since 3 + 97 + 3 + 6 + 1 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (397361533) and next prime (397361579).

It can be written as a sum of positive squares in only one way, i.e., 395373456 + 1988100 = 19884^2 + 1410^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×397361556² = 315792412373482272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5518875 + ... + 5518946.

Almost surely, 2^397361556 is an apocalyptic number.

397361556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

397361556 is an abundant number, since it is smaller than the sum of its proper divisors (607080246).

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

397361556 is a wasteful number, since it uses less digits than its factorization.

397361556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11037831 (or 11037826 counting only the distinct ones).

The product of its digits is 510300, while the sum is 45.

The square root of 397361556 is about 19933.9297681115. The cubic root of 397361556 is about 735.1827062104.

The spelling of 397361556 in words is "three hundred ninety-seven million, three hundred sixty-one thousand, five hundred fifty-six".