27664000 has 256 divisors, whose sum is σ = 89107200. Its totient is φ = 8294400.

The previous prime is 27663991. The next prime is 27664003. The reversal of 27664000 is 46672.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1455991 + ... + 1456009.

It is an arithmetic number, because the mean of its divisors is an integer number (348075).

Almost surely, 2^27664000 is an apocalyptic number.

27664000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27664000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44553600).

27664000 is an abundant number, since it is smaller than the sum of its proper divisors (61443200).

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

27664000 is a wasteful number, since it uses less digits than its factorization.

27664000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 27664000 is about 5259.6577835445. The cubic root of 27664000 is about 302.4393704048.

The spelling of 27664000 in words is "twenty-seven million, six hundred sixty-four thousand".