28782469253 has 4 divisors (see below), whose sum is σ = 28901898828. Its totient is φ = 28663039680.

The previous prime is 28782469237. The next prime is 28782469301. The reversal of 28782469253 is 35296428782.

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 9897663169 + 18884806084 = 99487^2 + 137422^2 .

It is a cyclic number.

It is not a de Polignac number, because 28782469253 - 2⁴ = 28782469237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782469213) 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, 59714426 + ... + 59714907.

It is an arithmetic number, because the mean of its divisors is an integer number (7225474707).

Almost surely, 2^28782469253 is an apocalyptic number.

It is an amenable number.

28782469253 is a deficient number, since it is larger than the sum of its proper divisors (119429575).

28782469253 is a wasteful number, since it uses less digits than its factorization.

28782469253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119429574.

The product of its digits is 11612160, while the sum is 56.

The spelling of 28782469253 in words is "twenty-eight billion, seven hundred eighty-two million, four hundred sixty-nine thousand, two hundred fifty-three".