397454660 has 12 divisors (see below), whose sum is σ = 834654828. Its totient is φ = 158981856.

The previous prime is 397454639. The next prime is 397454677. The reversal of 397454660 is 66454793.

It can be written as a sum of positive squares in 2 ways, for example, as 154157056 + 243297604 = 12416^2 + 15598^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9936347 + ... + 9936386.

It is an arithmetic number, because the mean of its divisors is an integer number (69554569).

Almost surely, 2^397454660 is an apocalyptic number.

It is an amenable number.

397454660 is an abundant number, since it is smaller than the sum of its proper divisors (437200168).

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

397454660 is a wasteful number, since it uses less digits than its factorization.

397454660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19872742 (or 19872740 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 397454660 is about 19936.2649460725. The cubic root of 397454660 is about 735.2401208448.

The spelling of 397454660 in words is "three hundred ninety-seven million, four hundred fifty-four thousand, six hundred sixty".