28897172264231 has 8 divisors (see below), whose sum is σ = 30201358032384. Its totient is φ = 27596968743960.

The previous prime is 28897172264117. The next prime is 28897172264291. The reversal of 28897172264231 is 13246227179882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28897172264231 - 2³⁴ = 28879992395047 is a prime.

It is a super-2 number, since 2×28897172264231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897172264291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995547131 + ... + 995576156.

It is an arithmetic number, because the mean of its divisors is an integer number (3775169754048).

Almost surely, 2^{28897172264231} is an apocalyptic number.

28897172264231 is a deficient number, since it is larger than the sum of its proper divisors (1304185768153).

28897172264231 is a wasteful number, since it uses less digits than its factorization.

28897172264231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991123941.

The product of its digits is 32514048, while the sum is 62.

The spelling of 28897172264231 in words is "twenty-eight trillion, eight hundred ninety-seven billion, one hundred seventy-two million, two hundred sixty-four thousand, two hundred thirty-one".