27224640 has 224 divisors, whose sum is σ = 100949760. Its totient is φ = 6893568.

The previous prime is 27224621. The next prime is 27224653. The reversal of 27224640 is 4642272.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198652 + ... + 198788.

Almost surely, 2^27224640 is an apocalyptic number.

27224640 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 27224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50474880).

27224640 is an abundant number, since it is smaller than the sum of its proper divisors (73725120).

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

27224640 is a wasteful number, since it uses less digits than its factorization.

27224640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 27224640 is about 5217.7236415893. The cubic root of 27224640 is about 300.8297031932.

The spelling of 27224640 in words is "twenty-seven million, two hundred twenty-four thousand, six hundred forty".