681118438 has 96 divisors (see below), whose sum is σ = 1398019392. Its totient is φ = 242161920.

The previous prime is 681118421. The next prime is 681118463. The reversal of 681118438 is 834811186.

It is a self number, because there is not a number n which added to its sum of digits gives 681118438.

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 47 ways as a sum of consecutive naturals, for example, 3457356 + ... + 3457552.

It is an arithmetic number, because the mean of its divisors is an integer number (14562702).

Almost surely, 2^681118438 is an apocalyptic number.

681118438 is an abundant number, since it is smaller than the sum of its proper divisors (716900954).

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

681118438 is a wasteful number, since it uses less digits than its factorization.

681118438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 387 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 681118438 is about 26098.2458797521. The cubic root of 681118438 is about 879.8477861731.

The spelling of 681118438 in words is "six hundred eighty-one million, one hundred eighteen thousand, four hundred thirty-eight".