80816940 has 168 divisors, whose sum is σ = 266622048. Its totient is φ = 20528640.

The previous prime is 80816927. The next prime is 80816947. The reversal of 80816940 is 4961808.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 80816895 and 80816904.

It is not an unprimeable number, because it can be changed into a prime (80816947) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 335220 + ... + 335460.

It is an arithmetic number, because the mean of its divisors is an integer number (1587036).

Almost surely, 2^80816940 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 80816940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133311024).

80816940 is an abundant number, since it is smaller than the sum of its proper divisors (185805108).

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

80816940 is a wasteful number, since it uses less digits than its factorization.

80816940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80816940 is about 8989.8242474478. The cubic root of 80816940 is about 432.3486768328.

The spelling of 80816940 in words is "eighty million, eight hundred sixteen thousand, nine hundred forty".