80715840 has 112 divisors (see below), whose sum is σ = 259616448. Its totient is φ = 21243904.

The previous prime is 80715829. The next prime is 80715841. The reversal of 80715840 is 4851708.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (80715841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79174 + ... + 80186.

It is an arithmetic number, because the mean of its divisors is an integer number (2318004).

Almost surely, 2^80715840 is an apocalyptic number.

80715840 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 80715840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129808224).

80715840 is an abundant number, since it is smaller than the sum of its proper divisors (178900608).

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

80715840 is a wasteful number, since it uses less digits than its factorization.

80715840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 80715840 is about 8984.1994635026. The cubic root of 80715840 is about 432.1683157566.

The spelling of 80715840 in words is "eighty million, seven hundred fifteen thousand, eight hundred forty".