30681408 has 28 divisors (see below), whose sum is σ = 81178400. Its totient is φ = 10227072.

The previous prime is 30681367. The next prime is 30681419. The reversal of 30681408 is 80418603.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79708 + ... + 80091.

Almost surely, 2^30681408 is an apocalyptic number.

It is an amenable number.

30681408 is an abundant number, since it is smaller than the sum of its proper divisors (50496992).

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

30681408 is a wasteful number, since it uses less digits than its factorization.

30681408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159814 (or 159804 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30681408 is about 5539.0800680257. The cubic root of 30681408 is about 313.0582082709.

The spelling of 30681408 in words is "thirty million, six hundred eighty-one thousand, four hundred eight".