30889140 has 24 divisors (see below), whose sum is σ = 86489760. Its totient is φ = 8237088.

The previous prime is 30889139. The next prime is 30889151. The reversal of 30889140 is 4198803.

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, 257350 + ... + 257469.

It is an arithmetic number, because the mean of its divisors is an integer number (3603740).

Almost surely, 2^30889140 is an apocalyptic number.

30889140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30889140 is an abundant number, since it is smaller than the sum of its proper divisors (55600620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30889140 is a wasteful number, since it uses less digits than its factorization.

30889140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514831 (or 514829 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 30889140 is about 5557.7999244305. The cubic root of 30889140 is about 313.7631518854.

The spelling of 30889140 in words is "thirty million, eight hundred eighty-nine thousand, one hundred forty".