687674740 has 24 divisors (see below), whose sum is σ = 1449880992. Its totient is φ = 273972000.

The previous prime is 687674737. The next prime is 687674747. The reversal of 687674740 is 47476786.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687674747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63474 + ... + 73513.

It is an arithmetic number, because the mean of its divisors is an integer number (60411708).

Almost surely, 2^687674740 is an apocalyptic number.

It is an amenable number.

687674740 is an abundant number, since it is smaller than the sum of its proper divisors (762206252).

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

687674740 is a wasteful number, since it uses less digits than its factorization.

687674740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137247 (or 137245 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 49.

The square root of 687674740 is about 26223.5531536060. The cubic root of 687674740 is about 882.6618524146.

The spelling of 687674740 in words is "six hundred eighty-seven million, six hundred seventy-four thousand, seven hundred forty".