681339204 has 144 divisors (see below), whose sum is σ = 2188426240. Its totient is φ = 173871360.

The previous prime is 681339203. The next prime is 681339227. The reversal of 681339204 is 402933186.

It is a super-2 number, since 2×681339204² = 928446221814707232, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (681339203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98202 + ... + 104910.

Almost surely, 2^681339204 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 681339204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094213120).

681339204 is an abundant number, since it is smaller than the sum of its proper divisors (1507087036).

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

681339204 is a wasteful number, since it uses less digits than its factorization.

681339204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770 (or 6765 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 681339204 is about 26102.4750550594. The cubic root of 681339204 is about 879.9428354740.

The spelling of 681339204 in words is "six hundred eighty-one million, three hundred thirty-nine thousand, two hundred four".