397637064 has 192 divisors, whose sum is σ = 1245404160. Its totient is φ = 113435520.

The previous prime is 397637063. The next prime is 397637077. The reversal of 397637064 is 460736793.

397637064 is a `hidden beast` number, since 3 + 9 + 7 + 637 + 0 + 6 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (397637063) 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 47 ways as a sum of consecutive naturals, for example, 1511797 + ... + 1512059.

It is an arithmetic number, because the mean of its divisors is an integer number (6486480).

Almost surely, 2^397637064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397637064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622702080).

397637064 is an abundant number, since it is smaller than the sum of its proper divisors (847767096).

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

397637064 is a wasteful number, since it uses less digits than its factorization.

397637064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The square root of 397637064 is about 19940.8390996969. The cubic root of 397637064 is about 735.3525783080.

The spelling of 397637064 in words is "three hundred ninety-seven million, six hundred thirty-seven thousand, sixty-four".