28297295238 has 32 divisors (see below), whose sum is σ = 56768797152. Its totient is φ = 9403430400.

The previous prime is 28297295237. The next prime is 28297295239. The reversal of 28297295238 is 83259279282.

It is an interprime number because it is at equal distance from previous prime (28297295237) and next prime (28297295239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297295237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4728208 + ... + 4734188.

It is an arithmetic number, because the mean of its divisors is an integer number (1774024911).

Almost surely, 2^28297295238 is an apocalyptic number.

28297295238 is an abundant number, since it is smaller than the sum of its proper divisors (28471501914).

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

28297295238 is a wasteful number, since it uses less digits than its factorization.

28297295238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280.

The product of its digits is 8709120, while the sum is 57.

The spelling of 28297295238 in words is "twenty-eight billion, two hundred ninety-seven million, two hundred ninety-five thousand, two hundred thirty-eight".