2528684449 has 4 divisors (see below), whose sum is σ = 2563324036. Its totient is φ = 2494044864.

The previous prime is 2528684447. The next prime is 2528684479. The reversal of 2528684449 is 9444868252.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1947633424 + 581051025 = 44132^2 + 24105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528684449 - 2¹ = 2528684447 is a prime.

It is a super-2 number, since 2×2528684449² = 12788490085228867202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2528684396 and 2528684405.

It is not an unprimeable number, because it can be changed into a prime (2528684447) 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, 17319684 + ... + 17319829.

It is an arithmetic number, because the mean of its divisors is an integer number (640831009).

Almost surely, 2^2528684449 is an apocalyptic number.

It is an amenable number.

2528684449 is a deficient number, since it is larger than the sum of its proper divisors (34639587).

2528684449 is an equidigital number, since it uses as much as digits as its factorization.

2528684449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34639586.

The product of its digits is 4423680, while the sum is 52.

The square root of 2528684449 is about 50286.0263791046. The cubic root of 2528684449 is about 1362.3798528739.

The spelling of 2528684449 in words is "two billion, five hundred twenty-eight million, six hundred eighty-four thousand, four hundred forty-nine".