28376657 has 4 divisors (see below), whose sum is σ = 28657716. Its totient is φ = 28095600.

The previous prime is 28376639. The next prime is 28376659. The reversal of 28376657 is 75667382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14508481 + 13868176 = 3809^2 + 3724^2 .

It is a cyclic number.

It is not a de Polignac number, because 28376657 - 2¹⁴ = 28360273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28376659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140378 + ... + 140579.

It is an arithmetic number, because the mean of its divisors is an integer number (7164429).

Almost surely, 2^28376657 is an apocalyptic number.

It is an amenable number.

28376657 is a deficient number, since it is larger than the sum of its proper divisors (281059).

28376657 is a wasteful number, since it uses less digits than its factorization.

28376657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281058.

The product of its digits is 423360, while the sum is 44.

The square root of 28376657 is about 5326.9744696216. The cubic root of 28376657 is about 305.0144470448.

The spelling of 28376657 in words is "twenty-eight million, three hundred seventy-six thousand, six hundred fifty-seven".