27621481 has 16 divisors (see below), whose sum is σ = 30032640. Its totient is φ = 25309440.

The previous prime is 27621467. The next prime is 27621511. The reversal of 27621481 is 18412672.

It is a cyclic number.

It is not a de Polignac number, because 27621481 - 2¹⁵ = 27588713 is a prime.

It is a super-2 number, since 2×27621481² = 1525892425266722, which contains 22 as substring.

Its product of digits (5376) is a multiple of the sum of its prime divisors (384).

It is not an unprimeable number, because it can be changed into a prime (27621401) 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 15 ways as a sum of consecutive naturals, for example, 175855 + ... + 176011.

It is an arithmetic number, because the mean of its divisors is an integer number (1877040).

Almost surely, 2^27621481 is an apocalyptic number.

It is an amenable number.

27621481 is a deficient number, since it is larger than the sum of its proper divisors (2411159).

27621481 is a wasteful number, since it uses less digits than its factorization.

27621481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its digits is 5376, while the sum is 31.

The square root of 27621481 is about 5255.6142362240. The cubic root of 27621481 is about 302.2843432522.

The spelling of 27621481 in words is "twenty-seven million, six hundred twenty-one thousand, four hundred eighty-one".