27780481 has 8 divisors (see below), whose sum is σ = 29101824. Its totient is φ = 26468640.

The previous prime is 27780479. The next prime is 27780491. The reversal of 27780481 is 18408772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27780481 - 2¹ = 27780479 is a prime.

It is a super-2 number, since 2×27780481² = 1543510249182722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27780481.

It is not an unprimeable number, because it can be changed into a prime (27780461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4005 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (3637728).

Almost surely, 2^27780481 is an apocalyptic number.

It is an amenable number.

27780481 is a deficient number, since it is larger than the sum of its proper divisors (1321343).

27780481 is a wasteful number, since it uses less digits than its factorization.

27780481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 27780481 is about 5270.7192108857. The cubic root of 27780481 is about 302.8632559816.

It can be divided in two parts, 277804 and 81, that added together give a triangular number (277885 = T₇₄₅).

The spelling of 27780481 in words is "twenty-seven million, seven hundred eighty thousand, four hundred eighty-one".