28451343287 has 16 divisors (see below), whose sum is σ = 29782153440. Its totient is φ = 27145316352.

The previous prime is 28451343257. The next prime is 28451343289. The reversal of 28451343287 is 78234315482.

It is a cyclic number.

It is not a de Polignac number, because 28451343287 - 2⁸ = 28451343031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451343289) 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, 1091468 + ... + 1117230.

It is an arithmetic number, because the mean of its divisors is an integer number (1861384590).

Almost surely, 2^28451343287 is an apocalyptic number.

28451343287 is a deficient number, since it is larger than the sum of its proper divisors (1330810153).

28451343287 is a wasteful number, since it uses less digits than its factorization.

28451343287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26242.

The product of its digits is 1290240, while the sum is 47.

The spelling of 28451343287 in words is "twenty-eight billion, four hundred fifty-one million, three hundred forty-three thousand, two hundred eighty-seven".