28826431 has 4 divisors (see below), whose sum is σ = 28840752. Its totient is φ = 28812112.

The previous prime is 28826423. The next prime is 28826437. The reversal of 28826431 is 13462882.

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

It is a cyclic number.

It is not a de Polignac number, because 28826431 - 2³ = 28826423 is a prime.

It is a super-2 number, since 2×28826431² = 1661926248395522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28826437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3526 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (7210188).

Almost surely, 2^28826431 is an apocalyptic number.

28826431 is a deficient number, since it is larger than the sum of its proper divisors (14321).

28826431 is a wasteful number, since it uses less digits than its factorization.

28826431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14320.

The product of its digits is 18432, while the sum is 34.

The square root of 28826431 is about 5369.0251442883. The cubic root of 28826431 is about 306.6175143078.

The spelling of 28826431 in words is "twenty-eight million, eight hundred twenty-six thousand, four hundred thirty-one".