30922128 has 80 divisors (see below), whose sum is σ = 91660800. Its totient is φ = 9970560.

The previous prime is 30922127. The next prime is 30922141. The reversal of 30922128 is 82122903.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (30922127) 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, 12238 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (1145760).

Almost surely, 2^30922128 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 30922128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45830400).

30922128 is an abundant number, since it is smaller than the sum of its proper divisors (60738672).

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

30922128 is a wasteful number, since it uses less digits than its factorization.

30922128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30922128 is about 5560.7668535913. The cubic root of 30922128 is about 313.8748064072.

The spelling of 30922128 in words is "thirty million, nine hundred twenty-two thousand, one hundred twenty-eight".