84397222144 has 81 divisors (see below), whose sum is σ = 171650082051. Its totient is φ = 41415390720.

The previous prime is 84397222139. The next prime is 84397222181. The reversal of 84397222144 is 44122279348.

The square root of 84397222144 is 290512.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×84397222144² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84397222094 and 84397222103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 311428729 + ... + 311428999.

Almost surely, 2^84397222144 is an apocalyptic number.

84397222144 is the 290512-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84397222144

84397222144 is an abundant number, since it is smaller than the sum of its proper divisors (87252859907).

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

84397222144 is an frugal number, since it uses more digits than its factorization.

84397222144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 340 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 84397222144 in words is "eighty-four billion, three hundred ninety-seven million, two hundred twenty-two thousand, one hundred forty-four".