28827657 has 20 divisors (see below), whose sum is σ = 43211520. Its totient is φ = 19152504.

The previous prime is 28827649. The next prime is 28827679. The reversal of 28827657 is 75672882.

It is not a de Polignac number, because 28827657 - 2³ = 28827649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28827637) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38428 + ... + 39170.

It is an arithmetic number, because the mean of its divisors is an integer number (2160576).

Almost surely, 2^28827657 is an apocalyptic number.

28827657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28827657 is a deficient number, since it is larger than the sum of its proper divisors (14383863).

28827657 is an equidigital number, since it uses as much as digits as its factorization.

28827657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1225 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 28827657 is about 5369.1393165013. The cubic root of 28827657 is about 306.6218611026.

The spelling of 28827657 in words is "twenty-eight million, eight hundred twenty-seven thousand, six hundred fifty-seven".