28444129605456 has 40 divisors (see below), whose sum is σ = 73484457631200. Its totient is φ = 9480887569536.

The previous prime is 28444129605449. The next prime is 28444129605491. The reversal of 28444129605456 is 65450692144482.

It is a self number, because there is not a number n which added to its sum of digits gives 28444129605456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14339131 + ... + 16201818.

It is an arithmetic number, because the mean of its divisors is an integer number (1837111440780).

Almost surely, 2^{28444129605456} is an apocalyptic number.

It is an amenable number.

28444129605456 is an abundant number, since it is smaller than the sum of its proper divisors (45040328025744).

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

28444129605456 is a wasteful number, since it uses less digits than its factorization.

28444129605456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30560363 (or 30560357 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 60.

The spelling of 28444129605456 in words is "twenty-eight trillion, four hundred forty-four billion, one hundred twenty-nine million, six hundred five thousand, four hundred fifty-six".