28031094144 has 128 divisors (see below), whose sum is σ = 83584552800. Its totient is φ = 9247260672.

The previous prime is 28031094139. The next prime is 28031094149. The reversal of 28031094144 is 44149013082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28031094139) and next prime (28031094149).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28031094099 and 28031094108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28031094149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293424 + ... + 377040.

Almost surely, 2^28031094144 is an apocalyptic number.

28031094144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28031094144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41792276400).

28031094144 is an abundant number, since it is smaller than the sum of its proper divisors (55553458656).

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

28031094144 is an equidigital number, since it uses as much as digits as its factorization.

28031094144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83737 (or 83719 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 28031094144 in words is "twenty-eight billion, thirty-one million, ninety-four thousand, one hundred forty-four".