30885457 has 4 divisors (see below), whose sum is σ = 30957220. Its totient is φ = 30813696.

The previous prime is 30885451. The next prime is 30885467. The reversal of 30885457 is 75458803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1628176 + 29257281 = 1276^2 + 5409^2 .

It is a cyclic number.

It is not a de Polignac number, because 30885457 - 2⁷ = 30885329 is a prime.

It is a super-2 number, since 2×30885457² = 1907822908197698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30885451) 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 3 ways as a sum of consecutive naturals, for example, 35232 + ... + 36097.

It is an arithmetic number, because the mean of its divisors is an integer number (7739305).

Almost surely, 2^30885457 is an apocalyptic number.

It is an amenable number.

30885457 is a deficient number, since it is larger than the sum of its proper divisors (71763).

30885457 is an equidigital number, since it uses as much as digits as its factorization.

30885457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71762.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 30885457 is about 5557.4685784087. The cubic root of 30885457 is about 313.7506810988.

The spelling of 30885457 in words is "thirty million, eight hundred eighty-five thousand, four hundred fifty-seven".