28075724458 has 8 divisors (see below), whose sum is σ = 42803973540. Its totient is φ = 13807733280.

The previous prime is 28075724449. The next prime is 28075724459. The reversal of 28075724458 is 85442757082.

It can be written as a sum of positive squares in 2 ways, for example, as 16778798089 + 11296926369 = 129533^2 + 106287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28075724459) 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 3 ways as a sum of consecutive naturals, for example, 115064323 + ... + 115064566.

Almost surely, 2^28075724458 is an apocalyptic number.

28075724458 is a deficient number, since it is larger than the sum of its proper divisors (14728249082).

28075724458 is a wasteful number, since it uses less digits than its factorization.

28075724458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230128952.

The product of its (nonzero) digits is 5017600, while the sum is 52.

The spelling of 28075724458 in words is "twenty-eight billion, seventy-five million, seven hundred twenty-four thousand, four hundred fifty-eight".