84999900 has 72 divisors (see below), whose sum is σ = 246883504. Its totient is φ = 22579200.

The previous prime is 84999833. The next prime is 84999907. The reversal of 84999900 is 999948.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 84999900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84999907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125964 + ... + 126636.

Almost surely, 2^84999900 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 84999900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123441752).

84999900 is an abundant number, since it is smaller than the sum of its proper divisors (161883604).

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

84999900 is a wasteful number, since it uses less digits than its factorization.

84999900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 84999900 is about 9219.5390340298. The cubic root of 84999900 is about 439.6827947911.

Adding to 84999900 its sum of digits (48), we get a palindrome (84999948).

The spelling of 84999900 in words is "eighty-four million, nine hundred ninety-nine thousand, nine hundred".