30028750 has 20 divisors (see below), whose sum is σ = 56288232. Its totient is φ = 12011000.

The previous prime is 30028729. The next prime is 30028763. The reversal of 30028750 is 5782003.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10762 + ... + 13261.

Almost surely, 2^30028750 is an apocalyptic number.

30028750 is a deficient number, since it is larger than the sum of its proper divisors (26259482).

30028750 is an equidigital number, since it uses as much as digits as its factorization.

30028750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24045 (or 24030 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 30028750 is about 5479.8494504868. The cubic root of 30028750 is about 310.8224777207.

The spelling of 30028750 in words is "thirty million, twenty-eight thousand, seven hundred fifty".