2528278259 has 4 divisors (see below), whose sum is σ = 2722761216. Its totient is φ = 2333795304.

The previous prime is 2528278241. The next prime is 2528278279. The reversal of 2528278259 is 9528728252.

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

It is a cyclic number.

It is not a de Polignac number, because 2528278259 - 2²⁸ = 2259842803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2528278219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97241459 + ... + 97241484.

It is an arithmetic number, because the mean of its divisors is an integer number (680690304).

Almost surely, 2^2528278259 is an apocalyptic number.

2528278259 is a deficient number, since it is larger than the sum of its proper divisors (194482957).

2528278259 is a wasteful number, since it uses less digits than its factorization.

2528278259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194482956.

The product of its digits is 1612800, while the sum is 50.

The square root of 2528278259 is about 50281.9874209443. The cubic root of 2528278259 is about 1362.3069012770.

The spelling of 2528278259 in words is "two billion, five hundred twenty-eight million, two hundred seventy-eight thousand, two hundred fifty-nine".