30409866 has 12 divisors (see below), whose sum is σ = 65888082. Its totient is φ = 10136616.

The previous prime is 30409859. The next prime is 30409867. The reversal of 30409866 is 66890403.

It can be written as a sum of positive squares in only one way, i.e., 28933641 + 1476225 = 5379^2 + 1215^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30409866.

It is not an unprimeable number, because it can be changed into a prime (30409867) 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, 844701 + ... + 844736.

Almost surely, 2^30409866 is an apocalyptic number.

30409866 is an abundant number, since it is smaller than the sum of its proper divisors (35478216).

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

30409866 is a wasteful number, since it uses less digits than its factorization.

30409866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689445 (or 1689442 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 30409866 is about 5514.5141218425. The cubic root of 30409866 is about 312.1319092129.

The spelling of 30409866 in words is "thirty million, four hundred nine thousand, eight hundred sixty-six".