30561398 has 24 divisors (see below), whose sum is σ = 53631072. Its totient is φ = 13023024.

The previous prime is 30561397. The next prime is 30561403. The reversal of 30561398 is 89316503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30561397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18515 + ... + 20097.

It is an arithmetic number, because the mean of its divisors is an integer number (2234628).

Almost surely, 2^30561398 is an apocalyptic number.

30561398 is a deficient number, since it is larger than the sum of its proper divisors (23069674).

30561398 is a wasteful number, since it uses less digits than its factorization.

30561398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 30561398 is about 5528.2364276503. The cubic root of 30561398 is about 312.6495003075.

The spelling of 30561398 in words is "thirty million, five hundred sixty-one thousand, three hundred ninety-eight".