28296657 has 12 divisors (see below), whose sum is σ = 40951300. Its totient is φ = 18828288.

The previous prime is 28296629. The next prime is 28296659. The reversal of 28296657 is 75669282.

It can be written as a sum of positive squares in 2 ways, for example, as 17564481 + 10732176 = 4191^2 + 3276^2 .

It is not a de Polignac number, because 28296657 - 2¹⁶ = 28231121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28296659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2469 + ... + 7917.

Almost surely, 2^28296657 is an apocalyptic number.

It is an amenable number.

28296657 is a deficient number, since it is larger than the sum of its proper divisors (12654643).

28296657 is a wasteful number, since it uses less digits than its factorization.

28296657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6032 (or 6029 counting only the distinct ones).

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

The square root of 28296657 is about 5319.4602169769. The cubic root of 28296657 is about 304.7275431237.

The spelling of 28296657 in words is "twenty-eight million, two hundred ninety-six thousand, six hundred fifty-seven".