84644388 has 36 divisors (see below), whose sum is σ = 221342940. Its totient is φ = 27241536.

The previous prime is 84644369. The next prime is 84644401. The reversal of 84644388 is 88344648.

It can be written as a sum of positive squares in 2 ways, for example, as 62062884 + 22581504 = 7878^2 + 4752^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39495 + ... + 41582.

It is an arithmetic number, because the mean of its divisors is an integer number (6148415).

Almost surely, 2^84644388 is an apocalyptic number.

It is an amenable number.

84644388 is an abundant number, since it is smaller than the sum of its proper divisors (136698552).

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

84644388 is a wasteful number, since it uses less digits than its factorization.

84644388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81116 (or 81111 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The square root of 84644388 is about 9200.2384751701. The cubic root of 84644388 is about 439.0689472329.

The spelling of 84644388 in words is "eighty-four million, six hundred forty-four thousand, three hundred eighty-eight".