30028732 has 24 divisors (see below), whose sum is σ = 55835136. Its totient is φ = 14082048.

The previous prime is 30028729. The next prime is 30028763. The reversal of 30028732 is 23782003.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30028697 and 30028706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25468 + ... + 26620.

It is an arithmetic number, because the mean of its divisors is an integer number (2326464).

Almost surely, 2^30028732 is an apocalyptic number.

It is an amenable number.

30028732 is a deficient number, since it is larger than the sum of its proper divisors (25806404).

30028732 is a wasteful number, since it uses less digits than its factorization.

30028732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 30028732 is about 5479.8478081056. The cubic root of 30028732 is about 310.8224156158.

The spelling of 30028732 in words is "thirty million, twenty-eight thousand, seven hundred thirty-two".