30993140 has 12 divisors (see below), whose sum is σ = 65085636. Its totient is φ = 12397248.

The previous prime is 30993139. The next prime is 30993251. The reversal of 30993140 is 4139903.

It can be written as a sum of positive squares in 2 ways, for example, as 5973136 + 25020004 = 2444^2 + 5002^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774809 + ... + 774848.

It is an arithmetic number, because the mean of its divisors is an integer number (5423803).

Almost surely, 2^30993140 is an apocalyptic number.

It is an amenable number.

30993140 is an abundant number, since it is smaller than the sum of its proper divisors (34092496).

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

30993140 is a wasteful number, since it uses less digits than its factorization.

30993140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549666 (or 1549664 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 30993140 is about 5567.1482825590. The cubic root of 30993140 is about 314.1148916251.

The spelling of 30993140 in words is "thirty million, nine hundred ninety-three thousand, one hundred forty".