27940780 has 48 divisors (see below), whose sum is σ = 68443200. Its totient is φ = 9577344.

The previous prime is 27940777. The next prime is 27940853. The reversal of 27940780 is 8704972.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4824 + ... + 8896.

It is an arithmetic number, because the mean of its divisors is an integer number (1425900).

Almost surely, 2^27940780 is an apocalyptic number.

27940780 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 27940780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34221600).

27940780 is an abundant number, since it is smaller than the sum of its proper divisors (40502420).

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

27940780 is a wasteful number, since it uses less digits than its factorization.

27940780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 27940780 is about 5285.9038962130. The cubic root of 27940780 is about 303.4446665614. Note that the first 3 decimals are identical.

The spelling of 27940780 in words is "twenty-seven million, nine hundred forty thousand, seven hundred eighty".