27966780 has 36 divisors (see below), whose sum is σ = 84833112. Its totient is φ = 7457760.

The previous prime is 27966773. The next prime is 27966787. The reversal of 27966780 is 8766972.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27966773) and next prime (27966787).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27966787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77506 + ... + 77865.

Almost surely, 2^27966780 is an apocalyptic number.

27966780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27966780 is an abundant number, since it is smaller than the sum of its proper divisors (56866332).

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

27966780 is a wasteful number, since it uses less digits than its factorization.

27966780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155386 (or 155381 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 27966780 is about 5288.3626955798. The cubic root of 27966780 is about 303.5387597997.

The spelling of 27966780 in words is "twenty-seven million, nine hundred sixty-six thousand, seven hundred eighty".