27491436 has 72 divisors (see below), whose sum is σ = 80138240. Its totient is φ = 7783776.

The previous prime is 27491393. The next prime is 27491441. The reversal of 27491436 is 63419472.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 27491436.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31575 + ... + 32433.

Almost surely, 2^27491436 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 27491436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40069120).

27491436 is an abundant number, since it is smaller than the sum of its proper divisors (52646804).

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

27491436 is a wasteful number, since it uses less digits than its factorization.

27491436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 998 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 27491436 is about 5243.2276319077. The cubic root of 27491436 is about 301.8092007097.

Subtracting 27491436 from its reverse (63419472), we obtain a square (35928036 = 5994²).

The spelling of 27491436 in words is "twenty-seven million, four hundred ninety-one thousand, four hundred thirty-six".