30708864 has 192 divisors, whose sum is σ = 98654400. Its totient is φ = 9123840.

The previous prime is 30708863. The next prime is 30708869. The reversal of 30708864 is 46880703.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30708863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503394 + ... + 503454.

It is an arithmetic number, because the mean of its divisors is an integer number (513825).

Almost surely, 2^30708864 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 30708864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49327200).

30708864 is an abundant number, since it is smaller than the sum of its proper divisors (67945536).

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

30708864 is a wasteful number, since it uses less digits than its factorization.

30708864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 30708864 is about 5541.5579036946. The cubic root of 30708864 is about 313.1515629993.

The spelling of 30708864 in words is "thirty million, seven hundred eight thousand, eight hundred sixty-four".