28440168446 has 8 divisors (see below), whose sum is σ = 42782489400. Its totient is φ = 14179338648.

The previous prime is 28440168431. The next prime is 28440168451. The reversal of 28440168446 is 64486104482.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28440168446.

It is a congruent number.

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, 20371916 + ... + 20373311.

It is an arithmetic number, because the mean of its divisors is an integer number (5347811175).

Almost surely, 2^28440168446 is an apocalyptic number.

28440168446 is a deficient number, since it is larger than the sum of its proper divisors (14342320954).

28440168446 is a wasteful number, since it uses less digits than its factorization.

28440168446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40745578.

The product of its (nonzero) digits is 1179648, while the sum is 47.

The spelling of 28440168446 in words is "twenty-eight billion, four hundred forty million, one hundred sixty-eight thousand, four hundred forty-six".