28700823 has 16 divisors (see below), whose sum is σ = 40426496. Its totient is φ = 18083520.

The previous prime is 28700821. The next prime is 28700831. The reversal of 28700823 is 32800782.

It is not a de Polignac number, because 28700823 - 2¹ = 28700821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700821) 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, 411 + ... + 7587.

It is an arithmetic number, because the mean of its divisors is an integer number (2526656).

Almost surely, 2^28700823 is an apocalyptic number.

28700823 is a deficient number, since it is larger than the sum of its proper divisors (11725673).

28700823 is a wasteful number, since it uses less digits than its factorization.

28700823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28700823 is about 5357.3149058087. The cubic root of 28700823 is about 306.1715151926.

The spelling of 28700823 in words is "twenty-eight million, seven hundred thousand, eight hundred twenty-three".