28081802567 has 32 divisors (see below), whose sum is σ = 35404142592. Its totient is φ = 21680193024.

The previous prime is 28081802513. The next prime is 28081802579. The reversal of 28081802567 is 76520818082.

It is not a de Polignac number, because 28081802567 - 2⁸ = 28081802311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081852567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1431608 + ... + 1451090.

It is an arithmetic number, because the mean of its divisors is an integer number (1106379456).

Almost surely, 2^28081802567 is an apocalyptic number.

28081802567 is a deficient number, since it is larger than the sum of its proper divisors (7322340025).

28081802567 is a wasteful number, since it uses less digits than its factorization.

28081802567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19887.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 28081802567 in words is "twenty-eight billion, eighty-one million, eight hundred two thousand, five hundred sixty-seven".