28244721058438 has 32 divisors (see below), whose sum is σ = 42945078480480. Its totient is φ = 13931093729280.

The previous prime is 28244721058369. The next prime is 28244721058447. The reversal of 28244721058438 is 83485012744282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64962906 + ... + 65396242.

It is an arithmetic number, because the mean of its divisors is an integer number (1342033702515).

Almost surely, 2^{28244721058438} is an apocalyptic number.

28244721058438 is a deficient number, since it is larger than the sum of its proper divisors (14700357422042).

28244721058438 is a wasteful number, since it uses less digits than its factorization.

28244721058438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434952.

The product of its (nonzero) digits is 27525120, while the sum is 58.

The spelling of 28244721058438 in words is "twenty-eight trillion, two hundred forty-four billion, seven hundred twenty-one million, fifty-eight thousand, four hundred thirty-eight".