84100340 has 12 divisors (see below), whose sum is σ = 176610756. Its totient is φ = 33640128.

The previous prime is 84100333. The next prime is 84100349. The reversal of 84100340 is 4300148.

It can be written as a sum of positive squares in 2 ways, for example, as 24068836 + 60031504 = 4906^2 + 7748^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 4205017 = 84100340 / (8 + 4 + 1 + 0 + 0 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84100349) 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, 2102489 + ... + 2102528.

It is an arithmetic number, because the mean of its divisors is an integer number (14717563).

Almost surely, 2^84100340 is an apocalyptic number.

It is an amenable number.

84100340 is an abundant number, since it is smaller than the sum of its proper divisors (92510416).

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

84100340 is a wasteful number, since it uses less digits than its factorization.

84100340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205026 (or 4205024 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 84100340 is about 9170.6237519593. The cubic root of 84100340 is about 438.1262259302.

Adding to 84100340 its reverse (4300148), we get a palindrome (88400488).

The spelling of 84100340 in words is "eighty-four million, one hundred thousand, three hundred forty".