30857825 has 12 divisors (see below), whose sum is σ = 38568960. Its totient is φ = 24489360.

The previous prime is 30857809. The next prime is 30857833. The reversal of 30857825 is 52875803.

It is not a de Polignac number, because 30857825 - 2⁴ = 30857809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1685 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (3214080).

Almost surely, 2^30857825 is an apocalyptic number.

It is an amenable number.

30857825 is a deficient number, since it is larger than the sum of its proper divisors (7711135).

30857825 is a wasteful number, since it uses less digits than its factorization.

30857825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856 (or 9851 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 30857825 is about 5554.9819981707. The cubic root of 30857825 is about 313.6570863956.

The spelling of 30857825 in words is "thirty million, eight hundred fifty-seven thousand, eight hundred twenty-five".