28221741952 has 16 divisors (see below), whose sum is σ = 56223001800. Its totient is φ = 14110870912.

The previous prime is 28221741949. The next prime is 28221741997. The reversal of 28221741952 is 25914712282.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 28221741899 and 28221741908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110241052 + ... + 110241307.

Almost surely, 2^28221741952 is an apocalyptic number.

It is an amenable number.

28221741952 is a deficient number, since it is larger than the sum of its proper divisors (28001259848).

28221741952 is an equidigital number, since it uses as much as digits as its factorization.

28221741952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220482373 (or 220482361 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The spelling of 28221741952 in words is "twenty-eight billion, two hundred twenty-one million, seven hundred forty-one thousand, nine hundred fifty-two".