30899120 has 80 divisors (see below), whose sum is σ = 85708800. Its totient is φ = 10129152.

The previous prime is 30899087. The next prime is 30899147. The reversal of 30899120 is 2199803.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11681 + ... + 14079.

It is an arithmetic number, because the mean of its divisors is an integer number (1071360).

Almost surely, 2^30899120 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 30899120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42854400).

30899120 is an abundant number, since it is smaller than the sum of its proper divisors (54809680).

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

30899120 is a wasteful number, since it uses less digits than its factorization.

30899120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 30899120 is about 5558.6976892074. The cubic root of 30899120 is about 313.7969395864.

The spelling of 30899120 in words is "thirty million, eight hundred ninety-nine thousand, one hundred twenty".