27820427 has 16 divisors (see below), whose sum is σ = 30481920. Its totient is φ = 25300800.

The previous prime is 27820393. The next prime is 27820459. The reversal of 27820427 is 72402872.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27820427 - 2⁸ = 27820171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27820393 and 27820402.

It is not an unprimeable number, because it can be changed into a prime (27820127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55058 + ... + 55560.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^27820427 is an apocalyptic number.

27820427 is a deficient number, since it is larger than the sum of its proper divisors (2661493).

27820427 is a wasteful number, since it uses less digits than its factorization.

27820427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 27820427 is about 5274.5072755661. The cubic root of 27820427 is about 303.0083504399.

The spelling of 27820427 in words is "twenty-seven million, eight hundred twenty thousand, four hundred twenty-seven".