84444440 has 32 divisors (see below), whose sum is σ = 201178080. Its totient is φ = 31790592.

The previous prime is 84444439. The next prime is 84444463. The reversal of 84444440 is 4444448.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 84444397 and 84444406.

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, 61412 + ... + 62771.

It is an arithmetic number, because the mean of its divisors is an integer number (6286815).

Almost surely, 2^84444440 is an apocalyptic number.

It is an amenable number.

84444440 is an abundant number, since it is smaller than the sum of its proper divisors (116733640).

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

84444440 is a wasteful number, since it uses less digits than its factorization.

84444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124211 (or 124207 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 32.

The square root of 84444440 is about 9189.3655929014. The cubic root of 84444440 is about 438.7229499859.

Adding to 84444440 its reverse (4444448), we get a palindrome (88888888).

The spelling of 84444440 in words is "eighty-four million, four hundred forty-four thousand, four hundred forty".