8681904 has 240 divisors, whose sum is σ = 32497920. Its totient is φ = 2177280.

The previous prime is 8681899. The next prime is 8681923. The reversal of 8681904 is 4091868.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299362 + ... + 299390.

It is an arithmetic number, because the mean of its divisors is an integer number (135408).

Almost surely, 2^8681904 is an apocalyptic number.

8681904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8681904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16248960).

8681904 is an abundant number, since it is smaller than the sum of its proper divisors (23816016).

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

8681904 is a wasteful number, since it uses less digits than its factorization.

8681904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 8681904 is about 2946.5070846682. The cubic root of 8681904 is about 205.5283140698.

Subtracting from 8681904 its sum of digits (36), we obtain a palindrome (8681868).

It can be divided in two parts, 868 and 1904, that added together give a palindrome (2772).

The spelling of 8681904 in words is "eight million, six hundred eighty-one thousand, nine hundred four".