686971560 has 64 divisors (see below), whose sum is σ = 2248274880. Its totient is φ = 166538240.

The previous prime is 686971559. The next prime is 686971561. The reversal of 686971560 is 65179686.

It is an interprime number because it is at equal distance from previous prime (686971559) and next prime (686971561).

It is not an unprimeable number, because it can be changed into a prime (686971561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258897 + ... + 261536.

It is an arithmetic number, because the mean of its divisors is an integer number (35129295).

Almost surely, 2^686971560 is an apocalyptic number.

686971560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686971560 is an abundant number, since it is smaller than the sum of its proper divisors (1561303320).

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

686971560 is a wasteful number, since it uses less digits than its factorization.

686971560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520458 (or 520454 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 686971560 is about 26210.1423117083. The cubic root of 686971560 is about 882.3608952904.

The spelling of 686971560 in words is "six hundred eighty-six million, nine hundred seventy-one thousand, five hundred sixty".