28287162431 has 16 divisors (see below), whose sum is σ = 31620304800. Its totient is φ = 25081305600.

The previous prime is 28287162401. The next prime is 28287162433. The reversal of 28287162431 is 13426178282.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28287162431 is a prime.

It is a super-2 number, since 2×28287162431² (a number of 22 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 (28287162433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2198525 + ... + 2211353.

It is an arithmetic number, because the mean of its divisors is an integer number (1976269050).

Almost surely, 2^28287162431 is an apocalyptic number.

28287162431 is a deficient number, since it is larger than the sum of its proper divisors (3333142369).

28287162431 is a wasteful number, since it uses less digits than its factorization.

28287162431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770.

The product of its digits is 258048, while the sum is 44.

The spelling of 28287162431 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred sixty-two thousand, four hundred thirty-one".