30899904 has 112 divisors (see below), whose sum is σ = 94902528. Its totient is φ = 8690688.

The previous prime is 30899903. The next prime is 30899923. The reversal of 30899904 is 40999803.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (30899903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111414 + ... + 111690.

It is an arithmetic number, because the mean of its divisors is an integer number (847344).

Almost surely, 2^30899904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30899904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47451264).

30899904 is an abundant number, since it is smaller than the sum of its proper divisors (64002624).

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

30899904 is a wasteful number, since it uses less digits than its factorization.

30899904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30899904 is about 5558.7682088751. The cubic root of 30899904 is about 313.7995935425.

The spelling of 30899904 in words is "thirty million, eight hundred ninety-nine thousand, nine hundred four".