84644420 has 24 divisors (see below), whose sum is σ = 203146944. Its totient is φ = 29020896.

The previous prime is 84644401. The next prime is 84644423. The reversal of 84644420 is 2444648.

It is not an unprimeable number, because it can be changed into a prime (84644423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302162 + ... + 302441.

It is an arithmetic number, because the mean of its divisors is an integer number (8464456).

Almost surely, 2^84644420 is an apocalyptic number.

It is an amenable number.

84644420 is an abundant number, since it is smaller than the sum of its proper divisors (118502524).

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

84644420 is a wasteful number, since it uses less digits than its factorization.

84644420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604619 (or 604617 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 84644420 is about 9200.2402142553. The cubic root of 84644420 is about 439.0690025632.

The spelling of 84644420 in words is "eighty-four million, six hundred forty-four thousand, four hundred twenty".