30866985 has 48 divisors (see below), whose sum is σ = 57232656. Its totient is φ = 15335424.

The previous prime is 30866981. The next prime is 30866987. The reversal of 30866985 is 58966803.

It can be written as a sum of positive squares in 8 ways, for example, as 2702736 + 28164249 = 1644^2 + 5307^2 .

It is not a de Polignac number, because 30866985 - 2² = 30866981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 30866985.

It is not an unprimeable number, because it can be changed into a prime (30866981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119977 + ... + 120233.

It is an arithmetic number, because the mean of its divisors is an integer number (1192347).

Almost surely, 2^30866985 is an apocalyptic number.

It is an amenable number.

30866985 is a deficient number, since it is larger than the sum of its proper divisors (26365671).

30866985 is a wasteful number, since it uses less digits than its factorization.

30866985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 30866985 is about 5555.8064221137. The cubic root of 30866985 is about 313.6881192014.

The spelling of 30866985 in words is "thirty million, eight hundred sixty-six thousand, nine hundred eighty-five".