685020672 has 160 divisors (see below), whose sum is σ = 2317708800. Its totient is φ = 195692544.

The previous prime is 685020631. The next prime is 685020727. The reversal of 685020672 is 276020586.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93229 + ... + 100307.

It is an arithmetic number, because the mean of its divisors is an integer number (14485680).

Almost surely, 2^685020672 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 685020672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158854400).

685020672 is an abundant number, since it is smaller than the sum of its proper divisors (1632688128).

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

685020672 is an equidigital number, since it uses as much as digits as its factorization.

685020672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113 (or 7091 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 685020672 is about 26172.8995718854. The cubic root of 685020672 is about 881.5248493532.

The spelling of 685020672 in words is "six hundred eighty-five million, twenty thousand, six hundred seventy-two".