26428249 has 8 divisors (see below), whose sum is σ = 27395720. Its totient is φ = 25474176.

The previous prime is 26428243. The next prime is 26428253. The reversal of 26428249 is 94282462.

It can be written as a sum of positive squares in 4 ways, for example, as 9412624 + 17015625 = 3068^2 + 4125^2 .

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 26428249 - 2⁷ = 26428121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26428243) 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, 757 + ... + 7309.

It is an arithmetic number, because the mean of its divisors is an integer number (3424465).

Almost surely, 2^26428249 is an apocalyptic number.

It is an amenable number.

26428249 is a deficient number, since it is larger than the sum of its proper divisors (967471).

26428249 is a wasteful number, since it uses less digits than its factorization.

26428249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6699.

The product of its digits is 55296, while the sum is 37.

The square root of 26428249 is about 5140.8412735660. The cubic root of 26428249 is about 297.8672779545.

It can be divided in two parts, 26 and 428249, that added together give a triangular number (428275 = T₉₂₅).

The spelling of 26428249 in words is "twenty-six million, four hundred twenty-eight thousand, two hundred forty-nine".