397727764 has 24 divisors (see below), whose sum is σ = 796510400. Its totient is φ = 170228736.

The previous prime is 397727761. The next prime is 397727807. The reversal of 397727764 is 467727793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397727761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 31060.

Almost surely, 2^397727764 is an apocalyptic number.

It is an amenable number.

397727764 is an abundant number, since it is smaller than the sum of its proper divisors (398782636).

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

397727764 is a wasteful number, since it uses less digits than its factorization.

397727764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847 (or 18845 counting only the distinct ones).

The product of its digits is 3111696, while the sum is 52.

The square root of 397727764 is about 19943.1131972919. The cubic root of 397727764 is about 735.4084847400.

The spelling of 397727764 in words is "three hundred ninety-seven million, seven hundred twenty-seven thousand, seven hundred sixty-four".