30028404 has 96 divisors (see below), whose sum is σ = 83543040. Its totient is φ = 8218368.

The previous prime is 30028403. The next prime is 30028433. The reversal of 30028404 is 40482003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361747 + ... + 361829.

It is an arithmetic number, because the mean of its divisors is an integer number (870240).

Almost surely, 2^30028404 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 30028404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41771520).

30028404 is an abundant number, since it is smaller than the sum of its proper divisors (53514636).

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

30028404 is a wasteful number, since it uses less digits than its factorization.

30028404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30028404 is about 5479.8178801854. The cubic root of 30028404 is about 310.8212839205.

The spelling of 30028404 in words is "thirty million, twenty-eight thousand, four hundred four".