28581983 has 2 divisors, whose sum is σ = 28581984. Its totient is φ = 28581982.

The previous prime is 28581953. The next prime is 28582003. The reversal of 28581983 is 38918582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28581983 - 2¹⁴ = 28565599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28581953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14290991 + 14290992.

It is an arithmetic number, because the mean of its divisors is an integer number (14290992).

Almost surely, 2^28581983 is an apocalyptic number.

28581983 is a deficient number, since it is larger than the sum of its proper divisors (1).

28581983 is an equidigital number, since it uses as much as digits as its factorization.

28581983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 44.

The square root of 28581983 is about 5346.2120234798. The cubic root of 28581983 is about 305.7483477867.

The spelling of 28581983 in words is "twenty-eight million, five hundred eighty-one thousand, nine hundred eighty-three".