685902672 has 240 divisors, whose sum is σ = 2502339840. Its totient is φ = 170201088.

The previous prime is 685902667. The next prime is 685902677. The reversal of 685902672 is 276209586.

It is an interprime number because it is at equal distance from previous prime (685902667) and next prime (685902677).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685902677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221229 + ... + 224307.

It is an arithmetic number, because the mean of its divisors is an integer number (10426416).

Almost surely, 2^685902672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685902672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251169920).

685902672 is an abundant number, since it is smaller than the sum of its proper divisors (1816437168).

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

685902672 is a wasteful number, since it uses less digits than its factorization.

685902672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130 (or 3121 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 685902672 is about 26189.7436413570. The cubic root of 685902672 is about 881.9030235673.

The spelling of 685902672 in words is "six hundred eighty-five million, nine hundred two thousand, six hundred seventy-two".