83801556 has 72 divisors (see below), whose sum is σ = 222430208. Its totient is φ = 26568000.

The previous prime is 83801477. The next prime is 83801563. The reversal of 83801556 is 65510838.

It is a super-2 number, since 2×83801556² = 14045401576042272, which contains 22 as substring.

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 83801556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67461 + ... + 68691.

Almost surely, 2^83801556 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 83801556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111215104).

83801556 is an abundant number, since it is smaller than the sum of its proper divisors (138628652).

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

83801556 is a wasteful number, since it uses less digits than its factorization.

83801556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 83801556 is about 9154.3189806779. The cubic root of 83801556 is about 437.6067653448.

The spelling of 83801556 in words is "eighty-three million, eight hundred one thousand, five hundred fifty-six".