28442727 has 6 divisors (see below), whose sum is σ = 41083952. Its totient is φ = 18961812.

The previous prime is 28442723. The next prime is 28442731. The reversal of 28442727 is 72724482.

It is an interprime number because it is at equal distance from previous prime (28442723) and next prime (28442731).

It is not a de Polignac number, because 28442727 - 2² = 28442723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28442691 and 28442700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28442723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1580143 + ... + 1580160.

Almost surely, 2^28442727 is an apocalyptic number.

28442727 is a deficient number, since it is larger than the sum of its proper divisors (12641225).

28442727 is a wasteful number, since it uses less digits than its factorization.

28442727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160309 (or 3160306 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 28442727 is about 5333.1723204862. The cubic root of 28442727 is about 305.2509875267.

The spelling of 28442727 in words is "twenty-eight million, four hundred forty-two thousand, seven hundred twenty-seven".