27390540 has 48 divisors (see below), whose sum is σ = 76995072. Its totient is φ = 7275456.

The previous prime is 27390523. The next prime is 27390541. The reversal of 27390540 is 4509372.

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 = 27390498 and 27390507.

It is not an unprimeable number, because it can be changed into a prime (27390541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17677 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (1604064).

Almost surely, 2^27390540 is an apocalyptic number.

27390540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27390540 is an abundant number, since it is smaller than the sum of its proper divisors (49604532).

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

27390540 is a wasteful number, since it uses less digits than its factorization.

27390540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 27390540 is about 5233.5972332613. The cubic root of 27390540 is about 301.4395259463.

The spelling of 27390540 in words is "twenty-seven million, three hundred ninety thousand, five hundred forty".