27405240 has 128 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 6888960.

The previous prime is 27405229. The next prime is 27405251. The reversal of 27405240 is 4250472.

It is an interprime number because it is at equal distance from previous prime (27405229) and next prime (27405251).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 27405240.

It is a congruent number.

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, 197091 + ... + 197229.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^27405240 is an apocalyptic number.

27405240 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 27405240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43545600).

27405240 is an abundant number, since it is smaller than the sum of its proper divisors (59685960).

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

27405240 is a wasteful number, since it uses less digits than its factorization.

27405240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 27405240 is about 5235.0014326646. The cubic root of 27405240 is about 301.4934419889.

The spelling of 27405240 in words is "twenty-seven million, four hundred five thousand, two hundred forty".