28782093 has 16 divisors (see below), whose sum is σ = 41338880. Its totient is φ = 17753904.

The previous prime is 28782079. The next prime is 28782101. The reversal of 28782093 is 39028782.

It is not a de Polignac number, because 28782093 - 2⁹ = 28781581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3421 + ... + 8322.

It is an arithmetic number, because the mean of its divisors is an integer number (2583680).

Almost surely, 2^28782093 is an apocalyptic number.

It is an amenable number.

28782093 is a deficient number, since it is larger than the sum of its proper divisors (12556787).

28782093 is a wasteful number, since it uses less digits than its factorization.

28782093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11808.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28782093 is about 5364.8945003607. The cubic root of 28782093 is about 306.4602306054.

The spelling of 28782093 in words is "twenty-eight million, seven hundred eighty-two thousand, ninety-three".