27766540 has 12 divisors (see below), whose sum is σ = 58309776. Its totient is φ = 11106608.

The previous prime is 27766523. The next prime is 27766547. The reversal of 27766540 is 4566772.

It is a self number, because there is not a number n which added to its sum of digits gives 27766540.

It is not an unprimeable number, because it can be changed into a prime (27766547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694144 + ... + 694183.

It is an arithmetic number, because the mean of its divisors is an integer number (4859148).

Almost surely, 2^27766540 is an apocalyptic number.

27766540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27766540 is an abundant number, since it is smaller than the sum of its proper divisors (30543236).

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

27766540 is a wasteful number, since it uses less digits than its factorization.

27766540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388336 (or 1388334 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 27766540 is about 5269.3965498907. The cubic root of 27766540 is about 302.8125858351.

It can be divided in two parts, 2776 and 6540, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 27766540 in words is "twenty-seven million, seven hundred sixty-six thousand, five hundred forty".