397667520 has 84 divisors (see below), whose sum is σ = 1367820480. Its totient is φ = 106043904.

The previous prime is 397667503. The next prime is 397667537. The reversal of 397667520 is 25766793.

It is an interprime number because it is at equal distance from previous prime (397667503) and next prime (397667537).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 66160 + ... + 71919.

Almost surely, 2^397667520 is an apocalyptic number.

397667520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397667520 is an abundant number, since it is smaller than the sum of its proper divisors (970152960).

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

397667520 is a wasteful number, since it uses less digits than its factorization.

397667520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138102 (or 138089 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The square root of 397667520 is about 19941.6027440123. The cubic root of 397667520 is about 735.3713519825.

The spelling of 397667520 in words is "three hundred ninety-seven million, six hundred sixty-seven thousand, five hundred twenty".