83113840 has 80 divisors (see below), whose sum is σ = 203388768. Its totient is φ = 31546368.

The previous prime is 83113837. The next prime is 83113853. The reversal of 83113840 is 4831138.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 83113799 and 83113808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126954 + ... + 127606.

Almost surely, 2^83113840 is an apocalyptic number.

83113840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83113840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101694384).

83113840 is an abundant number, since it is smaller than the sum of its proper divisors (120274928).

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

83113840 is a wasteful number, since it uses less digits than its factorization.

83113840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 83113840 is about 9116.6792199792. The cubic root of 83113840 is about 436.4064050042.

Adding to 83113840 its reverse (4831138), we get a palindrome (87944978).

The spelling of 83113840 in words is "eighty-three million, one hundred thirteen thousand, eight hundred forty".