28726895 has 4 divisors (see below), whose sum is σ = 34472280. Its totient is φ = 22981512.

The previous prime is 28726883. The next prime is 28726897. The reversal of 28726895 is 59862782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28726895 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28726897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2872685 + ... + 2872694.

It is an arithmetic number, because the mean of its divisors is an integer number (8618070).

Almost surely, 2^28726895 is an apocalyptic number.

28726895 is a deficient number, since it is larger than the sum of its proper divisors (5745385).

28726895 is an equidigital number, since it uses as much as digits as its factorization.

28726895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745384.

The product of its digits is 483840, while the sum is 47.

The square root of 28726895 is about 5359.7476619707. The cubic root of 28726895 is about 306.2641964820.

The spelling of 28726895 in words is "twenty-eight million, seven hundred twenty-six thousand, eight hundred ninety-five".