30724828 has 12 divisors (see below), whose sum is σ = 54048400. Its totient is φ = 15282432.

The previous prime is 30724823. The next prime is 30724829. The reversal of 30724828 is 82842703.

It is a junction number, because it is equal to n+sod(n) for n = 30724793 and 30724802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30724823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19128 + ... + 20671.

Almost surely, 2^30724828 is an apocalyptic number.

It is an amenable number.

30724828 is a deficient number, since it is larger than the sum of its proper divisors (23323572).

30724828 is a wasteful number, since it uses less digits than its factorization.

30724828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39996 (or 39994 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 30724828 is about 5542.9981057186. The cubic root of 30724828 is about 313.2058175356.

The spelling of 30724828 in words is "thirty million, seven hundred twenty-four thousand, eight hundred twenty-eight".