30385720 has 32 divisors (see below), whose sum is σ = 68778720. Its totient is φ = 12081280.

The previous prime is 30385717. The next prime is 30385741. The reversal of 30385720 is 2758303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4725 + ... + 9115.

It is an arithmetic number, because the mean of its divisors is an integer number (2149335).

Almost surely, 2^30385720 is an apocalyptic number.

It is an amenable number.

30385720 is an abundant number, since it is smaller than the sum of its proper divisors (38393000).

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

30385720 is a wasteful number, since it uses less digits than its factorization.

30385720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575 (or 4571 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 30385720 is about 5512.3243736195. The cubic root of 30385720 is about 312.0492744881.

The spelling of 30385720 in words is "thirty million, three hundred eighty-five thousand, seven hundred twenty".