84809472 has 72 divisors (see below), whose sum is σ = 246261120. Its totient is φ = 25697280.

The previous prime is 84809393. The next prime is 84809489. The reversal of 84809472 is 27490848.

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, 3429 + ... + 13467.

Almost surely, 2^84809472 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 84809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123130560).

84809472 is an abundant number, since it is smaller than the sum of its proper divisors (161451648).

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

84809472 is a wasteful number, since it uses less digits than its factorization.

84809472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10069 (or 10055 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 84809472 is about 9209.2058289518. The cubic root of 84809472 is about 439.3542041327.

The spelling of 84809472 in words is "eighty-four million, eight hundred nine thousand, four hundred seventy-two".