27099440 has 40 divisors (see below), whose sum is σ = 63485520. Its totient is φ = 10757376.

The previous prime is 27099437. The next prime is 27099461. The reversal of 27099440 is 4499072.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 27099440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9902 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (1587138).

Almost surely, 2^27099440 is an apocalyptic number.

27099440 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 27099440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31742760).

27099440 is an abundant number, since it is smaller than the sum of its proper divisors (36386080).

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

27099440 is a wasteful number, since it uses less digits than its factorization.

27099440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589 (or 2583 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 27099440 is about 5205.7122471378. The cubic root of 27099440 is about 300.3678450786.

The spelling of 27099440 in words is "twenty-seven million, ninety-nine thousand, four hundred forty".