83844540 has 72 divisors (see below), whose sum is σ = 273899808. Its totient is φ = 20638080.

The previous prime is 83844533. The next prime is 83844559. The reversal of 83844540 is 4544838.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 83844495 and 83844504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15576 + ... + 20255.

It is an arithmetic number, because the mean of its divisors is an integer number (3804164).

Almost surely, 2^83844540 is an apocalyptic number.

It is an amenable number.

83844540 is an abundant number, since it is smaller than the sum of its proper divisors (190055268).

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

83844540 is a wasteful number, since it uses less digits than its factorization.

83844540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35859 (or 35854 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 83844540 is about 9156.6664239777. Note that the first 3 decimals coincide. The cubic root of 83844540 is about 437.6815725240.

The spelling of 83844540 in words is "eighty-three million, eight hundred forty-four thousand, five hundred forty".