27903421 has 24 divisors (see below), whose sum is σ = 35018880. Its totient is φ = 21767616.

The previous prime is 27903397. The next prime is 27903427. The reversal of 27903421 is 12430972.

It is not a de Polignac number, because 27903421 - 2⁵ = 27903389 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27903421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27903427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121735 + ... + 121963.

It is an arithmetic number, because the mean of its divisors is an integer number (1459120).

Almost surely, 2^27903421 is an apocalyptic number.

It is an amenable number.

27903421 is a deficient number, since it is larger than the sum of its proper divisors (7115459).

27903421 is a wasteful number, since it uses less digits than its factorization.

27903421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 27903421 is about 5282.3688814773. The cubic root of 27903421 is about 303.3093631852.

The spelling of 27903421 in words is "twenty-seven million, nine hundred three thousand, four hundred twenty-one".