28197324393 has 32 divisors (see below), whose sum is σ = 43427844096. Its totient is φ = 15940387008.

The previous prime is 28197324391. The next prime is 28197324401. The reversal of 28197324393 is 39342379182.

It is not a de Polignac number, because 28197324393 - 2¹ = 28197324391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28197324391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2358196 + ... + 2370122.

It is an arithmetic number, because the mean of its divisors is an integer number (1357120128).

Almost surely, 2^28197324393 is an apocalyptic number.

It is an amenable number.

28197324393 is a deficient number, since it is larger than the sum of its proper divisors (15230519703).

28197324393 is a wasteful number, since it uses less digits than its factorization.

28197324393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13133.

The product of its digits is 1959552, while the sum is 51.

The spelling of 28197324393 in words is "twenty-eight billion, one hundred ninety-seven million, three hundred twenty-four thousand, three hundred ninety-three".