28262729 has 8 divisors (see below), whose sum is σ = 31138560. Its totient is φ = 25438000.

The previous prime is 28262723. The next prime is 28262743. The reversal of 28262729 is 92726282.

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

It is a cyclic number.

It is not a de Polignac number, because 28262729 - 2⁴ = 28262713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28262692 and 28262701.

It is not an unprimeable number, because it can be changed into a prime (28262723) 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, 11609 + ... + 13830.

It is an arithmetic number, because the mean of its divisors is an integer number (3892320).

Almost surely, 2^28262729 is an apocalyptic number.

It is an amenable number.

28262729 is a deficient number, since it is larger than the sum of its proper divisors (2875831).

28262729 is a wasteful number, since it uses less digits than its factorization.

28262729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25551.

The product of its digits is 48384, while the sum is 38.

The square root of 28262729 is about 5316.2702151038. The cubic root of 28262729 is about 304.6057038673.

It can be divided in two parts, 2826 and 2729, that added together give a palindrome (5555).

The spelling of 28262729 in words is "twenty-eight million, two hundred sixty-two thousand, seven hundred twenty-nine".