28318038157 has 8 divisors (see below), whose sum is σ = 28374529176. Its totient is φ = 28261603392.

The previous prime is 28318038143. The next prime is 28318038169. The reversal of 28318038157 is 75183081382.

It can be written as a sum of positive squares in 4 ways, for example, as 23097636 + 28294940521 = 4806^2 + 168211^2 .

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 28318038157 - 2¹⁹ = 28317513869 is a prime.

It is a super-2 number, since 2×28318038157² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318038107) 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, 1076283 + ... + 1102279.

It is an arithmetic number, because the mean of its divisors is an integer number (3546816147).

Almost surely, 2^28318038157 is an apocalyptic number.

It is an amenable number.

28318038157 is a deficient number, since it is larger than the sum of its proper divisors (56491019).

28318038157 is a wasteful number, since it uses less digits than its factorization.

28318038157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28127.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 28318038157 in words is "twenty-eight billion, three hundred eighteen million, thirty-eight thousand, one hundred fifty-seven".