688740874 has 16 divisors (see below), whose sum is σ = 1051361280. Its totient is φ = 338301360.

The previous prime is 688740869. The next prime is 688740901. The reversal of 688740874 is 478047886.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109047 + ... + 115189.

It is an arithmetic number, because the mean of its divisors is an integer number (65710080).

Almost surely, 2^688740874 is an apocalyptic number.

688740874 is a deficient number, since it is larger than the sum of its proper divisors (362620406).

688740874 is a wasteful number, since it uses less digits than its factorization.

688740874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125.

The product of its (nonzero) digits is 2408448, while the sum is 52.

The square root of 688740874 is about 26243.8730754437. The cubic root of 688740874 is about 883.1177607410.

The spelling of 688740874 in words is "six hundred eighty-eight million, seven hundred forty thousand, eight hundred seventy-four".