685720074 has 16 divisors (see below), whose sum is σ = 1476935712. Its totient is φ = 210990768.

The previous prime is 685720073. The next prime is 685720081. The reversal of 685720074 is 470027586.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (685720073) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4395564 + ... + 4395719.

It is an arithmetic number, because the mean of its divisors is an integer number (92308482).

Almost surely, 2^685720074 is an apocalyptic number.

685720074 is an abundant number, since it is smaller than the sum of its proper divisors (791215638).

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

685720074 is a wasteful number, since it uses less digits than its factorization.

685720074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791301.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 685720074 is about 26186.2573499918. The cubic root of 685720074 is about 881.8247578372.

The spelling of 685720074 in words is "six hundred eighty-five million, seven hundred twenty thousand, seventy-four".