30428825 has 48 divisors (see below), whose sum is σ = 45711360. Its totient is φ = 19656000.

The previous prime is 30428807. The next prime is 30428831. The reversal of 30428825 is 52882403.

It is not a de Polignac number, because 30428825 - 2¹⁸ = 30166681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30428791 and 30428800.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385136 + ... + 385214.

It is an arithmetic number, because the mean of its divisors is an integer number (952320).

Almost surely, 2^30428825 is an apocalyptic number.

30428825 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30428825 is a deficient number, since it is larger than the sum of its proper divisors (15282535).

30428825 is a wasteful number, since it uses less digits than its factorization.

30428825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 30428825 is about 5516.2328631050. The cubic root of 30428825 is about 312.1967618444.

The spelling of 30428825 in words is "thirty million, four hundred twenty-eight thousand, eight hundred twenty-five".