28158634758 has 16 divisors (see below), whose sum is σ = 56341293120. Its totient is φ = 9382207656.

The previous prime is 28158634739. The next prime is 28158634769. The reversal of 28158634758 is 85743685182.

It is a super-2 number, since 2×28158634758² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28158634698 and 28158634707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985728 + ... + 1013891.

It is an arithmetic number, because the mean of its divisors is an integer number (3521330820).

Almost surely, 2^28158634758 is an apocalyptic number.

28158634758 is an abundant number, since it is smaller than the sum of its proper divisors (28182658362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28158634758 is a wasteful number, since it uses less digits than its factorization.

28158634758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001971.

The product of its digits is 12902400, while the sum is 57.

The spelling of 28158634758 in words is "twenty-eight billion, one hundred fifty-eight million, six hundred thirty-four thousand, seven hundred fifty-eight".