397616580 has 96 divisors (see below), whose sum is σ = 1249946880. Its totient is φ = 104924160.

The previous prime is 397616579. The next prime is 397616599. The reversal of 397616580 is 85616793.

It is a happy number.

397616580 is a `hidden beast` number, since 3 + 9 + 7 + 61 + 6 + 580 = 666.

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 31 ways as a sum of consecutive naturals, for example, 48585 + ... + 56175.

It is an arithmetic number, because the mean of its divisors is an integer number (13020280).

Almost surely, 2^397616580 is an apocalyptic number.

397616580 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 397616580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624973440).

397616580 is an abundant number, since it is smaller than the sum of its proper divisors (852330300).

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

397616580 is a wasteful number, since it uses less digits than its factorization.

397616580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706 (or 7698 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 397616580 is about 19940.3254737730. The cubic root of 397616580 is about 735.3399510304.

The spelling of 397616580 in words is "three hundred ninety-seven million, six hundred sixteen thousand, five hundred eighty".