80983638 has 48 divisors (see below), whose sum is σ = 182918736. Its totient is φ = 26853120.

The previous prime is 80983619. The next prime is 80983657. The reversal of 80983638 is 83638908.

80983638 is a `hidden beast` number, since 8 + 0 + 9 + 8 + 3 + 638 = 666.

It is an interprime number because it is at equal distance from previous prime (80983619) and next prime (80983657).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80983593 and 80983602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136270 + ... + 136862.

It is an arithmetic number, because the mean of its divisors is an integer number (3810807).

Almost surely, 2^80983638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80983638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91459368).

80983638 is an abundant number, since it is smaller than the sum of its proper divisors (101935098).

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

80983638 is a wasteful number, since it uses less digits than its factorization.

80983638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 80983638 is about 8999.0909540909. The cubic root of 80983638 is about 432.6457356890.

The spelling of 80983638 in words is "eighty million, nine hundred eighty-three thousand, six hundred thirty-eight".