83771136 has 108 divisors (see below), whose sum is σ = 244568688. Its totient is φ = 27574272.

The previous prime is 83771119. The next prime is 83771137. The reversal of 83771136 is 63117738.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 83771136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83771137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237136 + ... + 237488.

Almost surely, 2^83771136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83771136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122284344).

83771136 is an abundant number, since it is smaller than the sum of its proper divisors (160797552).

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

83771136 is a wasteful number, since it uses less digits than its factorization.

83771136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 461 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 83771136 is about 9152.6573190522. The cubic root of 83771136 is about 437.5538084566.

The spelling of 83771136 in words is "eighty-three million, seven hundred seventy-one thousand, one hundred thirty-six".