30689860 has 24 divisors (see below), whose sum is σ = 65091096. Its totient is φ = 12153600.

The previous prime is 30689851. The next prime is 30689861. The reversal of 30689860 is 6898603.

30689860 = 155² + 156² + ... + 457².

It can be written as a sum of positive squares in 4 ways, for example, as 20088324 + 10601536 = 4482^2 + 3256^2 .

It is not an unprimeable number, because it can be changed into a prime (30689861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5577 + ... + 9616.

It is an arithmetic number, because the mean of its divisors is an integer number (2712129).

Almost surely, 2^30689860 is an apocalyptic number.

It is an amenable number.

30689860 is an abundant number, since it is smaller than the sum of its proper divisors (34401236).

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

30689860 is a wasteful number, since it uses less digits than its factorization.

30689860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303 (or 15301 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 30689860 is about 5539.8429580630. The cubic root of 30689860 is about 313.0869523347.

The spelling of 30689860 in words is "thirty million, six hundred eighty-nine thousand, eight hundred sixty".