27864969 has 24 divisors (see below), whose sum is σ = 42262080. Its totient is φ = 16299360.

The previous prime is 27864929. The next prime is 27864971. The reversal of 27864969 is 96946872.

It is a happy number.

It is not a de Polignac number, because 27864969 - 2⁸ = 27864713 is a prime.

It is a super-2 number, since 2×27864969² = 1552912994741922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27864919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9204 + ... + 11850.

It is an arithmetic number, because the mean of its divisors is an integer number (1760920).

Almost surely, 2^27864969 is an apocalyptic number.

27864969 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27864969 is a deficient number, since it is larger than the sum of its proper divisors (14397111).

27864969 is a wasteful number, since it uses less digits than its factorization.

27864969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2690 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 27864969 is about 5278.7279717750. The cubic root of 27864969 is about 303.1699751030.

The spelling of 27864969 in words is "twenty-seven million, eight hundred sixty-four thousand, nine hundred sixty-nine".