687274160 has 80 divisors (see below), whose sum is σ = 1643838240. Its totient is φ = 267079680.

The previous prime is 687274153. The next prime is 687274163. The reversal of 687274160 is 61472786.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (687274163) 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, 828626 + ... + 829454.

It is an arithmetic number, because the mean of its divisors is an integer number (20547978).

Almost surely, 2^687274160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687274160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821919120).

687274160 is an abundant number, since it is smaller than the sum of its proper divisors (956564080).

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

687274160 is a wasteful number, since it uses less digits than its factorization.

687274160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 687274160 is about 26215.9142506989. The cubic root of 687274160 is about 882.4904315665.

The spelling of 687274160 in words is "six hundred eighty-seven million, two hundred seventy-four thousand, one hundred sixty".