80719440 has 80 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 21277696.

The previous prime is 80719421. The next prime is 80719469. The reversal of 80719440 is 4491708.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19471 + ... + 23249.

It is an arithmetic number, because the mean of its divisors is an integer number (3163860).

Almost surely, 2^80719440 is an apocalyptic number.

80719440 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 80719440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126554400).

80719440 is an abundant number, since it is smaller than the sum of its proper divisors (172389360).

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

80719440 is a wasteful number, since it uses less digits than its factorization.

80719440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884 (or 3878 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 80719440 is about 8984.3998130092. The cubic root of 80719440 is about 432.1747406947.

The spelling of 80719440 in words is "eighty million, seven hundred nineteen thousand, four hundred forty".