27645740 has 36 divisors (see below), whose sum is σ = 61684896. Its totient is φ = 10405632.

The previous prime is 27645733. The next prime is 27645763. The reversal of 27645740 is 4754672.

It is a super-3 number, since 3×27645740³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27645740.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3389 + ... + 8171.

Almost surely, 2^27645740 is an apocalyptic number.

27645740 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 27645740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30842448).

27645740 is an abundant number, since it is smaller than the sum of its proper divisors (34039156).

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

27645740 is a wasteful number, since it uses less digits than its factorization.

27645740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 27645740 is about 5257.9216426265. The cubic root of 27645740 is about 302.3728126832.

The spelling of 27645740 in words is "twenty-seven million, six hundred forty-five thousand, seven hundred forty".