83820726 has 48 divisors (see below), whose sum is σ = 198853200. Its totient is φ = 25306560.

The previous prime is 83820721. The next prime is 83820733. The reversal of 83820726 is 62702838.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83820721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68496 + ... + 69708.

It is an arithmetic number, because the mean of its divisors is an integer number (4142775).

Almost surely, 2^83820726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83820726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99426600).

83820726 is an abundant number, since it is smaller than the sum of its proper divisors (115032474).

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

83820726 is a wasteful number, since it uses less digits than its factorization.

83820726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 83820726 is about 9155.3659675624. The cubic root of 83820726 is about 437.6401310025.

The spelling of 83820726 in words is "eighty-three million, eight hundred twenty thousand, seven hundred twenty-six".