27428445 has 24 divisors (see below), whose sum is σ = 51865632. Its totient is φ = 13298400.

The previous prime is 27428441. The next prime is 27428449. The reversal of 27428445 is 54482472.

It is an interprime number because it is at equal distance from previous prime (27428441) and next prime (27428449).

It is not a de Polignac number, because 27428445 - 2² = 27428441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27428441) 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, 27211 + ... + 28200.

It is an arithmetic number, because the mean of its divisors is an integer number (2161068).

Almost surely, 2^27428445 is an apocalyptic number.

It is an amenable number.

27428445 is a deficient number, since it is larger than the sum of its proper divisors (24437187).

27428445 is a wasteful number, since it uses less digits than its factorization.

27428445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55433 (or 55430 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 27428445 is about 5237.2172954729. The cubic root of 27428445 is about 301.5785130874.

The spelling of 27428445 in words is "twenty-seven million, four hundred twenty-eight thousand, four hundred forty-five".