28700807818 has 8 divisors (see below), whose sum is σ = 43231343040. Its totient is φ = 14290360140.

The previous prime is 28700807809. The next prime is 28700807831. The reversal of 28700807818 is 81870800782.

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

It is a super-2 number, since 2×28700807818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30021288 + ... + 30022243.

It is an arithmetic number, because the mean of its divisors is an integer number (5403917880).

Almost surely, 2^28700807818 is an apocalyptic number.

28700807818 is a deficient number, since it is larger than the sum of its proper divisors (14530535222).

28700807818 is a wasteful number, since it uses less digits than its factorization.

28700807818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60043772.

The product of its (nonzero) digits is 401408, while the sum is 49.

The spelling of 28700807818 in words is "twenty-eight billion, seven hundred million, eight hundred seven thousand, eight hundred eighteen".