687607974 has 64 divisors (see below), whose sum is σ = 1552884480. Its totient is φ = 225504000.

The previous prime is 687607957. The next prime is 687607997. The reversal of 687607974 is 479706786.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 687607974.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1314477 + ... + 1314999.

It is an arithmetic number, because the mean of its divisors is an integer number (24263820).

Almost surely, 2^687607974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687607974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776442240).

687607974 is an abundant number, since it is smaller than the sum of its proper divisors (865276506).

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

687607974 is a wasteful number, since it uses less digits than its factorization.

687607974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The square root of 687607974 is about 26222.2801068099. The cubic root of 687607974 is about 882.6332857561.

The spelling of 687607974 in words is "six hundred eighty-seven million, six hundred seven thousand, nine hundred seventy-four".