30986869 has 12 divisors (see below), whose sum is σ = 33156000. Its totient is φ = 28952768.

The previous prime is 30986867. The next prime is 30986873. The reversal of 30986869 is 96868903.

It is not a de Polignac number, because 30986869 - 2¹ = 30986867 is a prime.

It is a super-2 number, since 2×30986869² = 1920372100846322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30986867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51432 + ... + 52030.

It is an arithmetic number, because the mean of its divisors is an integer number (2763000).

Almost surely, 2^30986869 is an apocalyptic number.

It is an amenable number.

30986869 is a deficient number, since it is larger than the sum of its proper divisors (2169131).

30986869 is a wasteful number, since it uses less digits than its factorization.

30986869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 30986869 is about 5566.5850393217. The cubic root of 30986869 is about 314.0937047070.

It can be divided in two parts, 309 and 86869, that added together give a palindrome (87178).

The spelling of 30986869 in words is "thirty million, nine hundred eighty-six thousand, eight hundred sixty-nine".