28259799157 has 8 divisors (see below), whose sum is σ = 29275529400. Its totient is φ = 27246819264.

The previous prime is 28259799143. The next prime is 28259799179. The reversal of 28259799157 is 75199795282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 131813361 + 28127985796 = 11481^2 + 167714^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28259799157 - 2¹¹ = 28259797109 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 (28259799107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666658 + ... + 707779.

It is an arithmetic number, because the mean of its divisors is an integer number (3659441175).

Almost surely, 2^28259799157 is an apocalyptic number.

It is an amenable number.

28259799157 is a deficient number, since it is larger than the sum of its proper divisors (1015730243).

28259799157 is a wasteful number, since it uses less digits than its factorization.

28259799157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375175.

The product of its digits is 28576800, while the sum is 64.

The spelling of 28259799157 in words is "twenty-eight billion, two hundred fifty-nine million, seven hundred ninety-nine thousand, one hundred fifty-seven".