28690823 has 12 divisors (see below), whose sum is σ = 33509160. Its totient is φ = 24493392.

The previous prime is 28690819. The next prime is 28690877. The reversal of 28690823 is 32809682.

It is a happy number.

It is not a de Polignac number, because 28690823 - 2² = 28690819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690423) 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, 12833 + ... + 14901.

It is an arithmetic number, because the mean of its divisors is an integer number (2792430).

Almost surely, 2^28690823 is an apocalyptic number.

28690823 is a deficient number, since it is larger than the sum of its proper divisors (4818337).

28690823 is a wasteful number, since it uses less digits than its factorization.

28690823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366 (or 2359 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28690823 is about 5356.3815211391. The cubic root of 28690823 is about 306.1359520915.

The spelling of 28690823 in words is "twenty-eight million, six hundred ninety thousand, eight hundred twenty-three".