30708189 has 6 divisors (see below), whose sum is σ = 44356286. Its totient is φ = 20472120.

The previous prime is 30708173. The next prime is 30708191. The reversal of 30708189 is 98180703.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 13816089 = 4110^2 + 3717^2 .

It is not a de Polignac number, because 30708189 - 2⁴ = 30708173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30708109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1706002 + ... + 1706019.

Almost surely, 2^30708189 is an apocalyptic number.

It is an amenable number.

30708189 is a deficient number, since it is larger than the sum of its proper divisors (13648097).

30708189 is a wasteful number, since it uses less digits than its factorization.

30708189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412027 (or 3412024 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 30708189 is about 5541.4969999090. The cubic root of 30708189 is about 313.1492685602.

The spelling of 30708189 in words is "thirty million, seven hundred eight thousand, one hundred eighty-nine".