397045764 has 36 divisors (see below), whose sum is σ = 1005617340. Its totient is φ = 132088320.

The previous prime is 397045741. The next prime is 397045777. The reversal of 397045764 is 467540793.

397045764 is a `hidden beast` number, since 3 + 9 + 70 + 4 + 576 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 275825664 + 121220100 = 16608^2 + 11010^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8172 + ... + 29340.

It is an arithmetic number, because the mean of its divisors is an integer number (27933815).

Almost surely, 2^397045764 is an apocalyptic number.

It is an amenable number.

397045764 is an abundant number, since it is smaller than the sum of its proper divisors (608571576).

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

397045764 is a wasteful number, since it uses less digits than its factorization.

397045764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21700 (or 21695 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 397045764 is about 19926.0072267376. The cubic root of 397045764 is about 734.9878992871.

The spelling of 397045764 in words is "three hundred ninety-seven million, forty-five thousand, seven hundred sixty-four".