397177560 has 128 divisors (see below), whose sum is σ = 1425816000. Its totient is φ = 97763328.

The previous prime is 397177559. The next prime is 397177567. The reversal of 397177560 is 65771793.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397177567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105 + ... + 28184.

Almost surely, 2^397177560 is an apocalyptic number.

397177560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397177560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712908000).

397177560 is an abundant number, since it is smaller than the sum of its proper divisors (1028638440).

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

397177560 is a wasteful number, since it uses less digits than its factorization.

397177560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28322 (or 28312 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The square root of 397177560 is about 19929.3140875445. The cubic root of 397177560 is about 735.0692146397.

The spelling of 397177560 in words is "three hundred ninety-seven million, one hundred seventy-seven thousand, five hundred sixty".