686929734 has 40 divisors (see below), whose sum is σ = 1541065680. Its totient is φ = 228703824.

The previous prime is 686929729. The next prime is 686929777. The reversal of 686929734 is 437929686.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170212 + ... + 174200.

It is an arithmetic number, because the mean of its divisors is an integer number (38526642).

Almost surely, 2^686929734 is an apocalyptic number.

686929734 is an abundant number, since it is smaller than the sum of its proper divisors (854135946).

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

686929734 is a wasteful number, since it uses less digits than its factorization.

686929734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5057 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 686929734 is about 26209.3444023310. The cubic root of 686929734 is about 882.3429875254.

The spelling of 686929734 in words is "six hundred eighty-six million, nine hundred twenty-nine thousand, seven hundred thirty-four".