28571923 has 2 divisors, whose sum is σ = 28571924. Its totient is φ = 28571922.

The previous prime is 28571903. The next prime is 28571947. The reversal of 28571923 is 32917582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28571923 is a prime.

It is not a weakly prime, because it can be changed into another prime (28571903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285961 + 14285962.

It is an arithmetic number, because the mean of its divisors is an integer number (14285962).

Almost surely, 2^28571923 is an apocalyptic number.

28571923 is a deficient number, since it is larger than the sum of its proper divisors (1).

28571923 is an equidigital number, since it uses as much as digits as its factorization.

28571923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 28571923 is about 5345.2710876063. The cubic root of 28571923 is about 305.7124721640.

The spelling of 28571923 in words is "twenty-eight million, five hundred seventy-one thousand, nine hundred twenty-three".