83408940 has 60 divisors (see below), whose sum is σ = 261662016. Its totient is φ = 22241952.

The previous prime is 83408921. The next prime is 83408947. The reversal of 83408940 is 4980438.

It is a tau number, because it is divible by the number of its divisors (60).

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 = 83408895 and 83408904.

It is not an unprimeable number, because it can be changed into a prime (83408947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24124 + ... + 27363.

Almost surely, 2^83408940 is an apocalyptic number.

It is an amenable number.

83408940 is an abundant number, since it is smaller than the sum of its proper divisors (178253076).

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

83408940 is a wasteful number, since it uses less digits than its factorization.

83408940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51508 (or 51497 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 83408940 is about 9132.8495005666. The cubic root of 83408940 is about 436.9222894526.

It can be divided in two parts, 83408 and 940, that added together give a palindrome (84348).

The spelling of 83408940 in words is "eighty-three million, four hundred eight thousand, nine hundred forty".