27906380 has 12 divisors (see below), whose sum is σ = 58603440. Its totient is φ = 11162544.

The previous prime is 27906379. The next prime is 27906397. The reversal of 27906380 is 8360972.

It is a self number, because there is not a number n which added to its sum of digits gives 27906380.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697640 + ... + 697679.

It is an arithmetic number, because the mean of its divisors is an integer number (4883620).

Almost surely, 2^27906380 is an apocalyptic number.

27906380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27906380 is an abundant number, since it is smaller than the sum of its proper divisors (30697060).

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

27906380 is a wasteful number, since it uses less digits than its factorization.

27906380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395328 (or 1395326 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 27906380 is about 5282.6489567262. The cubic root of 27906380 is about 303.3200842205.

The spelling of 27906380 in words is "twenty-seven million, nine hundred six thousand, three hundred eighty".