83840144 has 20 divisors (see below), whose sum is σ = 163035324. Its totient is φ = 41766528.

The previous prime is 83840143. The next prime is 83840173. The reversal of 83840144 is 44104838.

It can be written as a sum of positive squares in 2 ways, for example, as 40806544 + 43033600 = 6388^2 + 6560^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 83840144.

It is not an unprimeable number, because it can be changed into a prime (83840143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5027 + ... + 13890.

Almost surely, 2^83840144 is an apocalyptic number.

It is an amenable number.

83840144 is a deficient number, since it is larger than the sum of its proper divisors (79195180).

83840144 is a wasteful number, since it uses less digits than its factorization.

83840144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19202 (or 19196 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 83840144 is about 9156.4263771408. The cubic root of 83840144 is about 437.6739231218.

The spelling of 83840144 in words is "eighty-three million, eight hundred forty thousand, one hundred forty-four".