80168940 has 240 divisors, whose sum is σ = 276623424. Its totient is φ = 19353600.

The previous prime is 80168929. The next prime is 80168947. The reversal of 80168940 is 4986108.

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 = 80168895 and 80168904.

It is not an unprimeable number, because it can be changed into a prime (80168947) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1129105 + ... + 1129175.

Almost surely, 2^80168940 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 80168940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138311712).

80168940 is an abundant number, since it is smaller than the sum of its proper divisors (196454484).

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

80168940 is a wasteful number, since it uses less digits than its factorization.

80168940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 139 counting only the distinct ones).

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

The square root of 80168940 is about 8953.7109625004. The cubic root of 80168940 is about 431.1900332497.

The spelling of 80168940 in words is "eighty million, one hundred sixty-eight thousand, nine hundred forty".