30685700 has 18 divisors (see below), whose sum is σ = 66588186. Its totient is φ = 12274240.

The previous prime is 30685679. The next prime is 30685709. The reversal of 30685700 is 758603.

It can be written as a sum of positive squares in 3 ways, for example, as 369664 + 30316036 = 608^2 + 5506^2 .

It is a super-2 number, since 2×30685700² = 1883224368980000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30685709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153329 + ... + 153528.

Almost surely, 2^30685700 is an apocalyptic number.

It is an amenable number.

30685700 is an abundant number, since it is smaller than the sum of its proper divisors (35902486).

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

30685700 is a wasteful number, since it uses less digits than its factorization.

30685700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306871 (or 306864 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 30685700 is about 5539.4674834320. The cubic root of 30685700 is about 313.0728054191.

The spelling of 30685700 in words is "thirty million, six hundred eighty-five thousand, seven hundred".