30993700 has 18 divisors (see below), whose sum is σ = 67256546. Its totient is φ = 12397440.

The previous prime is 30993667. The next prime is 30993709. The reversal of 30993700 is 739903.

It can be written as a sum of positive squares in 3 ways, for example, as 2027776 + 28965924 = 1424^2 + 5382^2 .

It is not an unprimeable number, because it can be changed into a prime (30993709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154869 + ... + 155068.

Almost surely, 2^30993700 is an apocalyptic number.

It is an amenable number.

30993700 is an abundant number, since it is smaller than the sum of its proper divisors (36262846).

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

30993700 is a wasteful number, since it uses less digits than its factorization.

30993700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309951 (or 309944 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 30993700 is about 5567.1985773816. The cubic root of 30993700 is about 314.1167834769.

The spelling of 30993700 in words is "thirty million, nine hundred ninety-three thousand, seven hundred".