28894631 has 2 divisors, whose sum is σ = 28894632. Its totient is φ = 28894630.

The previous prime is 28894589. The next prime is 28894637. The reversal of 28894631 is 13649882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28894631 - 2¹⁰ = 28893607 is a prime.

It is a super-2 number, since 2×28894631² = 1669799401252322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28894637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14447315 + 14447316.

It is an arithmetic number, because the mean of its divisors is an integer number (14447316).

Almost surely, 2^28894631 is an apocalyptic number.

28894631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28894631 is an equidigital number, since it uses as much as digits as its factorization.

28894631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 28894631 is about 5375.3726382457. The cubic root of 28894631 is about 306.8591310479.

The spelling of 28894631 in words is "twenty-eight million, eight hundred ninety-four thousand, six hundred thirty-one".