30029920 has 24 divisors (see below), whose sum is σ = 70946064. Its totient is φ = 12011904.

The previous prime is 30029911. The next prime is 30029941. The reversal of 30029920 is 2992003.

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, 93684 + ... + 94003.

It is an arithmetic number, because the mean of its divisors is an integer number (2956086).

Almost surely, 2^30029920 is an apocalyptic number.

It is an amenable number.

30029920 is an abundant number, since it is smaller than the sum of its proper divisors (40916144).

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

30029920 is a wasteful number, since it uses less digits than its factorization.

30029920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187702 (or 187694 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 30029920 is about 5479.9562042046. The cubic root of 30029920 is about 310.8265144919.

The spelling of 30029920 in words is "thirty million, twenty-nine thousand, nine hundred twenty".