28713276 has 18 divisors (see below), whose sum is σ = 72580872. Its totient is φ = 9571080.

The previous prime is 28713271. The next prime is 28713281. The reversal of 28713276 is 67231782.

It is an interprime number because it is at equal distance from previous prime (28713271) and next prime (28713281).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 797591 = 28713276 / (2 + 8 + 7 + 1 + 3 + 2 + 7 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 28713276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28713271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398760 + ... + 398831.

Almost surely, 2^28713276 is an apocalyptic number.

It is an amenable number.

28713276 is an abundant number, since it is smaller than the sum of its proper divisors (43867596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28713276 is a wasteful number, since it uses less digits than its factorization.

28713276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797601 (or 797596 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28713276 is about 5358.4770224384. The cubic root of 28713276 is about 306.2157903756.

The spelling of 28713276 in words is "twenty-eight million, seven hundred thirteen thousand, two hundred seventy-six".