28218452844 has 12 divisors (see below), whose sum is σ = 65843056664. Its totient is φ = 9406150944.

The previous prime is 28218452839. The next prime is 28218452849. The reversal of 28218452844 is 44825481282.

It is an interprime number because it is at equal distance from previous prime (28218452839) and next prime (28218452849).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28218452793 and 28218452802.

It is not an unprimeable number, because it can be changed into a prime (28218452849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175768857 + ... + 1175768880.

Almost surely, 2^28218452844 is an apocalyptic number.

It is an amenable number.

28218452844 is an abundant number, since it is smaller than the sum of its proper divisors (37624603820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28218452844 is a wasteful number, since it uses less digits than its factorization.

28218452844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351537744 (or 2351537742 counting only the distinct ones).

The product of its digits is 1310720, while the sum is 48.

The spelling of 28218452844 in words is "twenty-eight billion, two hundred eighteen million, four hundred fifty-two thousand, eight hundred forty-four".