681089472 has 210 divisors, whose sum is σ = 2324350952. Its totient is φ = 193176576.

The previous prime is 681089471. The next prime is 681089503. The reversal of 681089472 is 274980186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681089471) 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 29 ways as a sum of consecutive naturals, for example, 4971388 + ... + 4971524.

Almost surely, 2^681089472 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 681089472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162175476).

681089472 is an abundant number, since it is smaller than the sum of its proper divisors (1643261480).

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

681089472 is an equidigital number, since it uses as much as digits as its factorization.

681089472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 681089472 is about 26097.6909323411. The cubic root of 681089472 is about 879.8353135345.

The spelling of 681089472 in words is "six hundred eighty-one million, eighty-nine thousand, four hundred seventy-two".