30028390 has 16 divisors (see below), whose sum is σ = 61772832. Its totient is φ = 10295424.

The previous prime is 30028357. The next prime is 30028399. The reversal of 30028390 is 9382003.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214419 + ... + 214558.

It is an arithmetic number, because the mean of its divisors is an integer number (3860802).

Almost surely, 2^30028390 is an apocalyptic number.

30028390 is an abundant number, since it is smaller than the sum of its proper divisors (31744442).

30028390 is a wasteful number, since it uses less digits than its factorization.

30028390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428991.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30028390 is about 5479.8166027706. The cubic root of 30028390 is about 310.8212356162.

The spelling of 30028390 in words is "thirty million, twenty-eight thousand, three hundred ninety".