27157680 has 240 divisors, whose sum is σ = 103993344. Its totient is φ = 6531840.

The previous prime is 27157673. The next prime is 27157693. The reversal of 27157680 is 8675172.

27157680 is a `hidden beast` number, since 2 + 7 + 1 + 576 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213777 + ... + 213903.

Almost surely, 2^27157680 is an apocalyptic number.

27157680 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 27157680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51996672).

27157680 is an abundant number, since it is smaller than the sum of its proper divisors (76835664).

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

27157680 is a wasteful number, since it uses less digits than its factorization.

27157680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 27157680 is about 5211.3030999933. The cubic root of 27157680 is about 300.5828668208.

The spelling of 27157680 in words is "twenty-seven million, one hundred fifty-seven thousand, six hundred eighty".