30103728 has 40 divisors (see below), whose sum is σ = 80280576. Its totient is φ = 9710400.

The previous prime is 30103727. The next prime is 30103751. The reversal of 30103728 is 82730103.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 30103698 and 30103707.

It is not an unprimeable number, because it can be changed into a prime (30103721) 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, 8628 + ... + 11603.

Almost surely, 2^30103728 is an apocalyptic number.

It is an amenable number.

30103728 is an abundant number, since it is smaller than the sum of its proper divisors (50176848).

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

30103728 is a wasteful number, since it uses less digits than its factorization.

30103728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20273 (or 20267 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30103728 is about 5486.6864317181. The cubic root of 30103728 is about 311.0809575462.

The spelling of 30103728 in words is "thirty million, one hundred three thousand, seven hundred twenty-eight".