28370786823 has 6 divisors (see below), whose sum is σ = 40980025424. Its totient is φ = 18913857876.

The previous prime is 28370786813. The next prime is 28370786827. The reversal of 28370786823 is 32868707382.

It is not a de Polignac number, because 28370786823 - 2²⁰ = 28369738247 is a prime.

It is a super-2 number, since 2×28370786823² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28370786823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28370786827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1576154815 + ... + 1576154832.

Almost surely, 2^28370786823 is an apocalyptic number.

28370786823 is a deficient number, since it is larger than the sum of its proper divisors (12609238601).

28370786823 is a wasteful number, since it uses less digits than its factorization.

28370786823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152309653 (or 3152309650 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 28370786823 in words is "twenty-eight billion, three hundred seventy million, seven hundred eighty-six thousand, eight hundred twenty-three".