687274280 has 128 divisors (see below), whose sum is σ = 1938401280. Its totient is φ = 213054720.

The previous prime is 687274253. The next prime is 687274319. The reversal of 687274280 is 82472786.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 698669 + ... + 699651.

It is an arithmetic number, because the mean of its divisors is an integer number (15143760).

Almost surely, 2^687274280 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 687274280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969200640).

687274280 is an abundant number, since it is smaller than the sum of its proper divisors (1251127000).

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

687274280 is a wasteful number, since it uses less digits than its factorization.

687274280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 687274280 is about 26215.9165393850. The cubic root of 687274280 is about 882.4904829283.

The spelling of 687274280 in words is "six hundred eighty-seven million, two hundred seventy-four thousand, two hundred eighty".