83855838 has 64 divisors (see below), whose sum is σ = 196204032. Its totient is φ = 23633280.

The previous prime is 83855833. The next prime is 83855857.

83855838 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83855833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55420 + ... + 56912.

It is an arithmetic number, because the mean of its divisors is an integer number (3065688).

Almost surely, 2^83855838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83855838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98102016).

83855838 is an abundant number, since it is smaller than the sum of its proper divisors (112348194).

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

83855838 is a wasteful number, since it uses less digits than its factorization.

83855838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569.

The product of its digits is 921600, while the sum is 48.

The square root of 83855838 is about 9157.2833307701. The cubic root of 83855838 is about 437.7012307482.

The spelling of 83855838 in words is "eighty-three million, eight hundred fifty-five thousand, eight hundred thirty-eight".