28110431 has 2 divisors, whose sum is σ = 28110432. Its totient is φ = 28110430.

The previous prime is 28110409. The next prime is 28110479. The reversal of 28110431 is 13401182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28110431 - 2¹⁰ = 28109407 is a prime.

It is a super-2 number, since 2×28110431² = 1580392662011522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28110631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14055215 + 14055216.

It is an arithmetic number, because the mean of its divisors is an integer number (14055216).

Almost surely, 2^28110431 is an apocalyptic number.

28110431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28110431 is an equidigital number, since it uses as much as digits as its factorization.

28110431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 28110431 is about 5301.9271024789. The cubic root of 28110431 is about 304.0575801308.

The spelling of 28110431 in words is "twenty-eight million, one hundred ten thousand, four hundred thirty-one".