28794431 has 2 divisors, whose sum is σ = 28794432. Its totient is φ = 28794430.

The previous prime is 28794397. The next prime is 28794457. The reversal of 28794431 is 13449782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28794431 - 2¹⁴ = 28778047 is a prime.

It is a super-2 number, since 2×28794431² = 1658238513227522, 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 (28794461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14397215 + 14397216.

It is an arithmetic number, because the mean of its divisors is an integer number (14397216).

Almost surely, 2^28794431 is an apocalyptic number.

28794431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28794431 is an equidigital number, since it uses as much as digits as its factorization.

28794431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 28794431 is about 5366.0442599740. The cubic root of 28794431 is about 306.5040143818.

The spelling of 28794431 in words is "twenty-eight million, seven hundred ninety-four thousand, four hundred thirty-one".