28926657 has 6 divisors (see below), whose sum is σ = 41782962. Its totient is φ = 19284432.

The previous prime is 28926649. The next prime is 28926679. The reversal of 28926657 is 75662982.

It can be written as a sum of positive squares in only one way, i.e., 28901376 + 25281 = 5376^2 + 159^2 .

It is not a de Polignac number, because 28926657 - 2³ = 28926649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28921657) 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, 1607028 + ... + 1607045.

It is an arithmetic number, because the mean of its divisors is an integer number (6963827).

Almost surely, 2^28926657 is an apocalyptic number.

It is an amenable number.

28926657 is a deficient number, since it is larger than the sum of its proper divisors (12856305).

28926657 is a wasteful number, since it uses less digits than its factorization.

28926657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214079 (or 3214076 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28926657 is about 5378.3507695203. The cubic root of 28926657 is about 306.9724605443.

The spelling of 28926657 in words is "twenty-eight million, nine hundred twenty-six thousand, six hundred fifty-seven".