28057887 has 64 divisors (see below), whose sum is σ = 50265600. Its totient is φ = 15331680.

The previous prime is 28057879. The next prime is 28057891. The reversal of 28057887 is 78875082.

It is a happy number.

It is not a de Polignac number, because 28057887 - 2³ = 28057879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 652488 + ... + 652530.

It is an arithmetic number, because the mean of its divisors is an integer number (785400).

Almost surely, 2^28057887 is an apocalyptic number.

28057887 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28057887 is a deficient number, since it is larger than the sum of its proper divisors (22207713).

28057887 is a wasteful number, since it uses less digits than its factorization.

28057887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 28057887 is about 5296.9696053498. The cubic root of 28057887 is about 303.8680138899.

The spelling of 28057887 in words is "twenty-eight million, fifty-seven thousand, eight hundred eighty-seven".