80371840 has 64 divisors (see below), whose sum is σ = 198385920. Its totient is φ = 31104000.

The previous prime is 80371829. The next prime is 80371909. The reversal of 80371840 is 4817308.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17815 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (3099780).

Almost surely, 2^80371840 is an apocalyptic number.

80371840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99192960).

80371840 is an abundant number, since it is smaller than the sum of its proper divisors (118014080).

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

80371840 is a wasteful number, since it uses less digits than its factorization.

80371840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 80371840 is about 8965.0342999902. The cubic root of 80371840 is about 431.5534938494.

The spelling of 80371840 in words is "eighty million, three hundred seventy-one thousand, eight hundred forty".