84500000 has 126 divisors (see below), whose sum is σ = 225172899. Its totient is φ = 31200000.

The previous prime is 84499991. The next prime is 84500021. The reversal of 84500000 is 548.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 11 ways, for example, as 84419344 + 80656 = 9188^2 + 284^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6500.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 6499994 + ... + 6500006.

Almost surely, 2^84500000 is an apocalyptic number.

84500000 is a gapful number since it is divisible by the number (80) 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 84500000

84500000 is an abundant number, since it is smaller than the sum of its proper divisors (140672899).

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

84500000 is an frugal number, since it uses more digits than its factorization.

84500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 84500000 is about 9192.3881554251. The cubic root of 84500000 is about 438.8191477665.

Adding to 84500000 its reverse (548), we get a palindrome (84500548).

It can be divided in two parts, 8 and 4500000, that multiplied together give a square (36000000 = 6000²).

The spelling of 84500000 in words is "eighty-four million, five hundred thousand".