28897493263 has 4 divisors (see below), whose sum is σ = 28902364920. Its totient is φ = 28892621608.

The previous prime is 28897493249. The next prime is 28897493291. The reversal of 28897493263 is 36239479882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36239479882 = 2 ⋅18119739941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28897493263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897493203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2426920 + ... + 2438797.

It is an arithmetic number, because the mean of its divisors is an integer number (7225591230).

Almost surely, 2^28897493263 is an apocalyptic number.

28897493263 is a deficient number, since it is larger than the sum of its proper divisors (4871657).

28897493263 is an equidigital number, since it uses as much as digits as its factorization.

28897493263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871656.

The product of its digits is 31352832, while the sum is 61.

The spelling of 28897493263 in words is "twenty-eight billion, eight hundred ninety-seven million, four hundred ninety-three thousand, two hundred sixty-three".