28424771 has 2 divisors, whose sum is σ = 28424772. Its totient is φ = 28424770.

The previous prime is 28424749. The next prime is 28424791. The reversal of 28424771 is 17742482.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28424771 is a prime.

It is equal to p_1766195 and since 28424771 and 1766195 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28424791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212385 + 14212386.

It is an arithmetic number, because the mean of its divisors is an integer number (14212386).

Almost surely, 2^28424771 is an apocalyptic number.

28424771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28424771 is an equidigital number, since it uses as much as digits as its factorization.

28424771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 35.

The square root of 28424771 is about 5331.4886288916. The cubic root of 28424771 is about 305.1867386410.

The spelling of 28424771 in words is "twenty-eight million, four hundred twenty-four thousand, seven hundred seventy-one".