397952487 has 32 divisors (see below), whose sum is σ = 622786560. Its totient is φ = 250750080.

The previous prime is 397952459. The next prime is 397952521. The reversal of 397952487 is 784259793.

397952487 is a `hidden beast` number, since 39 + 7 + 9 + 524 + 87 = 666.

It is not a de Polignac number, because 397952487 - 2²³ = 389563879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397952407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30463 + ... + 41519.

It is an arithmetic number, because the mean of its divisors is an integer number (19462080).

Almost surely, 2^397952487 is an apocalyptic number.

397952487 is a deficient number, since it is larger than the sum of its proper divisors (224834073).

397952487 is a wasteful number, since it uses less digits than its factorization.

397952487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140 (or 11134 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 397952487 is about 19948.7465019735. The cubic root of 397952487 is about 735.5469647927.

The spelling of 397952487 in words is "three hundred ninety-seven million, nine hundred fifty-two thousand, four hundred eighty-seven".