83289840 has 40 divisors (see below), whose sum is σ = 258199248. Its totient is φ = 22210560.

The previous prime is 83289809. The next prime is 83289847. The reversal of 83289840 is 4898238.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×83289840³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83289792 and 83289801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83289847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173281 + ... + 173760.

Almost surely, 2^83289840 is an apocalyptic number.

83289840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83289840 is an abundant number, since it is smaller than the sum of its proper divisors (174909408).

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

83289840 is a wasteful number, since it uses less digits than its factorization.

83289840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347057 (or 347051 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 83289840 is about 9126.3267528617. The cubic root of 83289840 is about 436.7142292914.

The spelling of 83289840 in words is "eighty-three million, two hundred eighty-nine thousand, eight hundred forty".