27229440 has 144 divisors (see below), whose sum is σ = 99485568. Its totient is φ = 6217728.

The previous prime is 27229429. The next prime is 27229457. The reversal of 27229440 is 4492272.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 27229398 and 27229407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26374 + ... + 27386.

It is an arithmetic number, because the mean of its divisors is an integer number (690872).

Almost surely, 2^27229440 is an apocalyptic number.

27229440 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 27229440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49742784).

27229440 is an abundant number, since it is smaller than the sum of its proper divisors (72256128).

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

27229440 is a wasteful number, since it uses less digits than its factorization.

27229440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 27229440 is about 5218.1835920174. The cubic root of 27229440 is about 300.8473820033.

The spelling of 27229440 in words is "twenty-seven million, two hundred twenty-nine thousand, four hundred forty".