28350431 has 2 divisors, whose sum is σ = 28350432. Its totient is φ = 28350430.

The previous prime is 28350403. The next prime is 28350433. The reversal of 28350431 is 13405382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28350431 - 2⁶ = 28350367 is a prime.

It is a super-2 number, since 2×28350431² = 1607493875771522, which contains 22 as substring.

Together with 28350433, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1761911 and since 28350431 and 1761911 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28350431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28350433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14175215 + 14175216.

It is an arithmetic number, because the mean of its divisors is an integer number (14175216).

Almost surely, 2^28350431 is an apocalyptic number.

28350431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28350431 is an equidigital number, since it uses as much as digits as its factorization.

28350431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 28350431 is about 5324.5122781340. The cubic root of 28350431 is about 304.9204522459.

The spelling of 28350431 in words is "twenty-eight million, three hundred fifty thousand, four hundred thirty-one".