80442936 has 128 divisors (see below), whose sum is σ = 258854400. Its totient is φ = 22671360.

The previous prime is 80442907. The next prime is 80442959. The reversal of 80442936 is 63924408.

It is a happy number.

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 80442936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125176 + ... + 125816.

It is an arithmetic number, because the mean of its divisors is an integer number (2022300).

Almost surely, 2^80442936 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 80442936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129427200).

80442936 is an abundant number, since it is smaller than the sum of its proper divisors (178411464).

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

80442936 is a wasteful number, since it uses less digits than its factorization.

80442936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 80442936 is about 8968.9986063105. The cubic root of 80442936 is about 431.6807054230.

The spelling of 80442936 in words is "eighty million, four hundred forty-two thousand, nine hundred thirty-six".