30984889 has 16 divisors (see below), whose sum is σ = 34779024. Its totient is φ = 27417600.

The previous prime is 30984883. The next prime is 30984911. The reversal of 30984889 is 98848903.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 16605625 + 14379264 = 4075^2 + 3792^2 .

It is a cyclic number.

It is not a de Polignac number, because 30984889 - 2⁹ = 30984377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30984883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32037 + ... + 32989.

It is an arithmetic number, because the mean of its divisors is an integer number (2173689).

Almost surely, 2^30984889 is an apocalyptic number.

It is an amenable number.

30984889 is a deficient number, since it is larger than the sum of its proper divisors (3794135).

30984889 is a wasteful number, since it uses less digits than its factorization.

30984889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 30984889 is about 5566.4071895613. The cubic root of 30984889 is about 314.0870145745.

The spelling of 30984889 in words is "thirty million, nine hundred eighty-four thousand, eight hundred eighty-nine".