30040028 has 12 divisors (see below), whose sum is σ = 52652880. Its totient is φ = 14996352.

The previous prime is 30040013. The next prime is 30040057. The reversal of 30040028 is 82004003.

It is a junction number, because it is equal to n+sod(n) for n = 30039988 and 30040015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2888 + ... + 8271.

It is an arithmetic number, because the mean of its divisors is an integer number (4387740).

Almost surely, 2^30040028 is an apocalyptic number.

It is an amenable number.

30040028 is a deficient number, since it is larger than the sum of its proper divisors (22612852).

30040028 is a wasteful number, since it uses less digits than its factorization.

30040028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11836 (or 11834 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 30040028 is about 5480.8783967536. The cubic root of 30040028 is about 310.8613850695.

The spelling of 30040028 in words is "thirty million, forty thousand, twenty-eight".