681183030 has 256 divisors, whose sum is σ = 2015539200. Its totient is φ = 145367040.

The previous prime is 681183011. The next prime is 681183053. The reversal of 681183030 is 30381186.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 8622531 + ... + 8622609.

It is an arithmetic number, because the mean of its divisors is an integer number (7873200).

Almost surely, 2^681183030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681183030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007769600).

681183030 is an abundant number, since it is smaller than the sum of its proper divisors (1334356170).

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

681183030 is a wasteful number, since it uses less digits than its factorization.

681183030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 681183030 is about 26099.4833282194. The cubic root of 681183030 is about 879.8755979449.

The spelling of 681183030 in words is "six hundred eighty-one million, one hundred eighty-three thousand, thirty".