30825638 has 16 divisors (see below), whose sum is σ = 48793920. Its totient is φ = 14565096.

The previous prime is 30825631. The next prime is 30825647. The reversal of 30825638 is 83652803.

It is a junction number, because it is equal to n+sod(n) for n = 30825598 and 30825607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30825631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20045 + ... + 21527.

It is an arithmetic number, because the mean of its divisors is an integer number (3049620).

Almost surely, 2^30825638 is an apocalyptic number.

30825638 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

30825638 is a deficient number, since it is larger than the sum of its proper divisors (17968282).

30825638 is a wasteful number, since it uses less digits than its factorization.

30825638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 30825638 is about 5552.0841131957. The cubic root of 30825638 is about 313.5479925882.

The spelling of 30825638 in words is "thirty million, eight hundred twenty-five thousand, six hundred thirty-eight".