82390813444 has 9 divisors (see below), whose sum is σ = 144184928167. Its totient is φ = 41195119684.

The previous prime is 82390813441. The next prime is 82390813451. The reversal of 82390813444 is 44431809328.

It is a happy number.

The square root of 82390813444 is 287038.

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

It is a super-2 number, since 2×82390813444² (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 = 82390813394 and 82390813403.

It is not an unprimeable number, because it can be changed into a prime (82390813441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 502317 + ... + 645835.

Almost surely, 2^82390813444 is an apocalyptic number.

82390813444 is the 287038-th square number.

It is an amenable number.

82390813444 is a deficient number, since it is larger than the sum of its proper divisors (61794114723).

82390813444 is an frugal number, since it uses more digits than its factorization.

82390813444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287042 (or 143521 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 82390813444 in words is "eighty-two billion, three hundred ninety million, eight hundred thirteen thousand, four hundred forty-four".