28424333457 has 20 divisors (see below), whose sum is σ = 45727276980. Its totient is φ = 17491896864.

The previous prime is 28424333429. The next prime is 28424333459. The reversal of 28424333457 is 75433342482.

28424333457 is a `hidden beast` number, since 28 + 4 + 243 + 334 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10451177361 + 17973156096 = 102231^2 + 134064^2 .

It is not a de Polignac number, because 28424333457 - 2¹⁴ = 28424317073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28424333459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13495782 + ... + 13497887.

It is an arithmetic number, because the mean of its divisors is an integer number (2286363849).

Almost surely, 2^28424333457 is an apocalyptic number.

28424333457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28424333457 is a deficient number, since it is larger than the sum of its proper divisors (17302943523).

28424333457 is a wasteful number, since it uses less digits than its factorization.

28424333457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26993694 (or 26993685 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 45.

The spelling of 28424333457 in words is "twenty-eight billion, four hundred twenty-four million, three hundred thirty-three thousand, four hundred fifty-seven".