28859723 has 2 divisors, whose sum is σ = 28859724. Its totient is φ = 28859722.

The previous prime is 28859717. The next prime is 28859737. The reversal of 28859723 is 32795882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28859723 - 2¹⁰ = 28858699 is a prime.

It is a super-2 number, since 2×28859723² = 1665767223273458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28859783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14429861 + 14429862.

It is an arithmetic number, because the mean of its divisors is an integer number (14429862).

Almost surely, 2^28859723 is an apocalyptic number.

28859723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28859723 is an equidigital number, since it uses as much as digits as its factorization.

28859723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 28859723 is about 5372.1246262536. The cubic root of 28859723 is about 306.7355076760.

The spelling of 28859723 in words is "twenty-eight million, eight hundred fifty-nine thousand, seven hundred twenty-three".