30989870 has 16 divisors (see below), whose sum is σ = 55946160. Its totient is φ = 12359424.

The previous prime is 30989869. The next prime is 30989909. The reversal of 30989870 is 7898903.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (3496635).

Almost surely, 2^30989870 is an apocalyptic number.

30989870 is a deficient number, since it is larger than the sum of its proper divisors (24956290).

30989870 is a wasteful number, since it uses less digits than its factorization.

30989870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9139.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 30989870 is about 5566.8545876464. The cubic root of 30989870 is about 314.1038441070.

The spelling of 30989870 in words is "thirty million, nine hundred eighty-nine thousand, eight hundred seventy".