28571423 has 2 divisors, whose sum is σ = 28571424. Its totient is φ = 28571422.

The previous prime is 28571401. The next prime is 28571449. The reversal of 28571423 is 32417582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28571423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28571423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28571483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285711 + 14285712.

It is an arithmetic number, because the mean of its divisors is an integer number (14285712).

Almost surely, 2^28571423 is an apocalyptic number.

28571423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28571423 is an equidigital number, since it uses as much as digits as its factorization.

28571423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 28571423 is about 5345.2243170890. The cubic root of 28571423 is about 305.7106888617.

The spelling of 28571423 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred twenty-three".