30904400 has 30 divisors (see below), whose sum is σ = 74248782. Its totient is φ = 12361600.

The previous prime is 30904397. The next prime is 30904409. The reversal of 30904400 is 440903.

It can be written as a sum of positive squares in 3 ways, for example, as 4443664 + 26460736 = 2108^2 + 5144^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30904409) 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 5 ways as a sum of consecutive naturals, for example, 38231 + ... + 39030.

Almost surely, 2^30904400 is an apocalyptic number.

It is an amenable number.

30904400 is an abundant number, since it is smaller than the sum of its proper divisors (43344382).

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

30904400 is a wasteful number, since it uses less digits than its factorization.

30904400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77279 (or 77268 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30904400 is about 5559.1726003066. The cubic root of 30904400 is about 313.8148123012.

The spelling of 30904400 in words is "thirty million, nine hundred four thousand, four hundred".