84921844 has 24 divisors (see below), whose sum is σ = 170089920. Its totient is φ = 36342336.

The previous prime is 84921841. The next prime is 84921869. The reversal of 84921844 is 44812948.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 84921797 and 84921806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84921841) 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, 22227 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (7087080).

Almost surely, 2^84921844 is an apocalyptic number.

It is an amenable number.

84921844 is an abundant number, since it is smaller than the sum of its proper divisors (85168076).

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

84921844 is a wasteful number, since it uses less digits than its factorization.

84921844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407 (or 4405 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 84921844 is about 9215.3048782989. The cubic root of 84921844 is about 439.5481656484.

The spelling of 84921844 in words is "eighty-four million, nine hundred twenty-one thousand, eight hundred forty-four".