27157640 has 16 divisors (see below), whose sum is σ = 61104780. Its totient is φ = 10863040.

The previous prime is 27157597. The next prime is 27157651. The reversal of 27157640 is 4675172.

It can be written as a sum of positive squares in 2 ways, for example, as 25664356 + 1493284 = 5066^2 + 1222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27157597 and 27157606.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 339431 + ... + 339510.

Almost surely, 2^27157640 is an apocalyptic number.

27157640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27157640 is an abundant number, since it is smaller than the sum of its proper divisors (33947140).

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

27157640 is a wasteful number, since it uses less digits than its factorization.

27157640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678952 (or 678948 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 27157640 is about 5211.2992621802. The cubic root of 27157640 is about 300.5827192466.

The spelling of 27157640 in words is "twenty-seven million, one hundred fifty-seven thousand, six hundred forty".