27664998 has 32 divisors (see below), whose sum is σ = 58012416. Its totient is φ = 8778528.

The previous prime is 27664997. The next prime is 27665003. The reversal of 27664998 is 89946672.

It is a happy number.

It is a super-2 number, since 2×27664998² = 1530704228680008, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27664998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42040 + ... + 42692.

It is an arithmetic number, because the mean of its divisors is an integer number (1812888).

Almost surely, 2^27664998 is an apocalyptic number.

27664998 is an abundant number, since it is smaller than the sum of its proper divisors (30347418).

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

27664998 is a wasteful number, since it uses less digits than its factorization.

27664998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

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

The square root of 27664998 is about 5259.7526557814. The cubic root of 27664998 is about 302.4430072717.

The spelling of 27664998 in words is "twenty-seven million, six hundred sixty-four thousand, nine hundred ninety-eight".