28423672791 has 24 divisors (see below), whose sum is σ = 38287398864. Its totient is φ = 18756165120.

The previous prime is 28423672747. The next prime is 28423672793. The reversal of 28423672791 is 19727632482.

It is not a de Polignac number, because 28423672791 - 2¹⁵ = 28423640023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423672793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28058401 + ... + 28059413.

It is an arithmetic number, because the mean of its divisors is an integer number (1595308286).

Almost surely, 2^28423672791 is an apocalyptic number.

28423672791 is a deficient number, since it is larger than the sum of its proper divisors (9863726073).

28423672791 is a wasteful number, since it uses less digits than its factorization.

28423672791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651 (or 1454 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The spelling of 28423672791 in words is "twenty-eight billion, four hundred twenty-three million, six hundred seventy-two thousand, seven hundred ninety-one".