28723263 has 8 divisors (see below), whose sum is σ = 38837376. Its totient is φ = 18879000.

The previous prime is 28723249. The next prime is 28723309. The reversal of 28723263 is 36232782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28723263 - 2⁶ = 28723199 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28723663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67213 + ... + 67638.

It is an arithmetic number, because the mean of its divisors is an integer number (4854672).

Almost surely, 2^28723263 is an apocalyptic number.

28723263 is a deficient number, since it is larger than the sum of its proper divisors (10114113).

28723263 is a wasteful number, since it uses less digits than its factorization.

28723263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134925.

The product of its digits is 24192, while the sum is 33.

The square root of 28723263 is about 5359.4088293393. The cubic root of 28723263 is about 306.2512887354.

The spelling of 28723263 in words is "twenty-eight million, seven hundred twenty-three thousand, two hundred sixty-three".