84721236 has 48 divisors (see below), whose sum is σ = 208656000. Its totient is φ = 26701312.

The previous prime is 84721207. The next prime is 84721249. The reversal of 84721236 is 63212748.

It is a junction number, because it is equal to n+sod(n) for n = 84721197 and 84721206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22840 + ... + 26288.

It is an arithmetic number, because the mean of its divisors is an integer number (4347000).

Almost surely, 2^84721236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84721236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104328000).

84721236 is an abundant number, since it is smaller than the sum of its proper divisors (123934764).

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

84721236 is a wasteful number, since it uses less digits than its factorization.

84721236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568 (or 3566 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 84721236 is about 9204.4139411480. The cubic root of 84721236 is about 439.2017828336.

The spelling of 84721236 in words is "eighty-four million, seven hundred twenty-one thousand, two hundred thirty-six".