84589640 has 16 divisors (see below), whose sum is σ = 190326780. Its totient is φ = 33835840.

The previous prime is 84589597. The next prime is 84589649. The reversal of 84589640 is 4698548.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76983076 + 7606564 = 8774^2 + 2758^2 .

It is a junction number, because it is equal to n+sod(n) for n = 84589591 and 84589600.

It is not an unprimeable number, because it can be changed into a prime (84589649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057331 + ... + 1057410.

Almost surely, 2^84589640 is an apocalyptic number.

It is an amenable number.

84589640 is an abundant number, since it is smaller than the sum of its proper divisors (105737140).

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

84589640 is a wasteful number, since it uses less digits than its factorization.

84589640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114752 (or 2114748 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 84589640 is about 9197.2626362413. The cubic root of 84589640 is about 438.9742635341.

The spelling of 84589640 in words is "eighty-four million, five hundred eighty-nine thousand, six hundred forty".