30825405 has 96 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 13837824.

The previous prime is 30825401. The next prime is 30825407. The reversal of 30825405 is 50452803.

30825405 = 421² + 422² + ... + 550².

It is not a de Polignac number, because 30825405 - 2² = 30825401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30825401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 390156 + ... + 390234.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^30825405 is an apocalyptic number.

It is an amenable number.

30825405 is an abundant number, since it is smaller than the sum of its proper divisors (32073795).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30825405 is a wasteful number, since it uses less digits than its factorization.

30825405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 30825405 is about 5552.0631300445. The cubic root of 30825405 is about 313.5472025870.

The spelling of 30825405 in words is "thirty million, eight hundred twenty-five thousand, four hundred five".