84099640 has 32 divisors (see below), whose sum is σ = 189485280. Its totient is φ = 33593472.

The previous prime is 84099619. The next prime is 84099677. The reversal of 84099640 is 4699048.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 84099593 and 84099602.

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, 57154 + ... + 58606.

It is an arithmetic number, because the mean of its divisors is an integer number (5921415).

Almost surely, 2^84099640 is an apocalyptic number.

It is an amenable number.

84099640 is an abundant number, since it is smaller than the sum of its proper divisors (105385640).

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

84099640 is a wasteful number, since it uses less digits than its factorization.

84099640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 84099640 is about 9170.5855865370. The cubic root of 84099640 is about 438.1250103615.

The spelling of 84099640 in words is "eighty-four million, ninety-nine thousand, six hundred forty".