27739640 has 32 divisors (see below), whose sum is σ = 64104480. Its totient is φ = 10795392.

The previous prime is 27739619. The next prime is 27739667. The reversal of 27739640 is 4693772.

It is a junction number, because it is equal to n+sod(n) for n = 27739594 and 27739603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7892 + ... + 10851.

It is an arithmetic number, because the mean of its divisors is an integer number (2003265).

Almost surely, 2^27739640 is an apocalyptic number.

27739640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27739640 is an abundant number, since it is smaller than the sum of its proper divisors (36364840).

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

27739640 is a wasteful number, since it uses less digits than its factorization.

27739640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18791 (or 18787 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 27739640 is about 5266.8434569484. The cubic root of 27739640 is about 302.7147667759.

The spelling of 27739640 in words is "twenty-seven million, seven hundred thirty-nine thousand, six hundred forty".