30128022 has 48 divisors (see below), whose sum is σ = 69290208. Its totient is φ = 9440640.

The previous prime is 30128011. The next prime is 30128039. The reversal of 30128022 is 22082103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30127986 and 30128004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24658 + ... + 25850.

It is an arithmetic number, because the mean of its divisors is an integer number (1443546).

Almost surely, 2^30128022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30128022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34645104).

30128022 is an abundant number, since it is smaller than the sum of its proper divisors (39162186).

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

30128022 is a wasteful number, since it uses less digits than its factorization.

30128022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30128022 is about 5488.8998897775. The cubic root of 30128022 is about 311.1646168273.

The spelling of 30128022 in words is "thirty million, one hundred twenty-eight thousand, twenty-two".