27394640 has 160 divisors (see below), whose sum is σ = 80994816. Its totient is φ = 8386560.

The previous prime is 27394603. The next prime is 27394649. The reversal of 27394640 is 4649372.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 27394640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27394649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385805 + ... + 385875.

Almost surely, 2^27394640 is an apocalyptic number.

27394640 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 27394640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40497408).

27394640 is an abundant number, since it is smaller than the sum of its proper divisors (53600176).

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

27394640 is a wasteful number, since it uses less digits than its factorization.

27394640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 27394640 is about 5233.9889185974. The cubic root of 27394640 is about 301.4545656936.

The spelling of 27394640 in words is "twenty-seven million, three hundred ninety-four thousand, six hundred forty".