27891696 has 160 divisors (see below), whose sum is σ = 92136960. Its totient is φ = 7077888.

The previous prime is 27891667. The next prime is 27891697. The reversal of 27891696 is 69619872.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27891697) 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, 108400 + ... + 108656.

It is an arithmetic number, because the mean of its divisors is an integer number (575856).

Almost surely, 2^27891696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27891696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46068480).

27891696 is an abundant number, since it is smaller than the sum of its proper divisors (64245264).

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

27891696 is a wasteful number, since it uses less digits than its factorization.

27891696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 305 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 27891696 is about 5281.2589408208. The cubic root of 27891696 is about 303.2668737653.

The spelling of 27891696 in words is "twenty-seven million, eight hundred ninety-one thousand, six hundred ninety-six".