84639996 has 144 divisors (see below), whose sum is σ = 255999744. Its totient is φ = 23079168.

The previous prime is 84639967. The next prime is 84640027. The reversal of 84639996 is 69993648.

It is a happy number.

84639996 is a `hidden beast` number, since 8 + 463 + 99 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 790975 + ... + 791081.

It is an arithmetic number, because the mean of its divisors is an integer number (1777776).

Almost surely, 2^84639996 is an apocalyptic number.

84639996 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84639996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127999872).

84639996 is an abundant number, since it is smaller than the sum of its proper divisors (171359748).

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

84639996 is a wasteful number, since it uses less digits than its factorization.

84639996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 235 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 84639996 is about 9199.9997826087. Note that the first 3 decimals coincide. The cubic root of 84639996 is about 439.0613530135.

The spelling of 84639996 in words is "eighty-four million, six hundred thirty-nine thousand, nine hundred ninety-six".