80533040 has 80 divisors (see below), whose sum is σ = 220938240. Its totient is φ = 26714880.

The previous prime is 80533021. The next prime is 80533069. The reversal of 80533040 is 4033508.

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

It is a junction number, because it is equal to n+sod(n) for n = 80532997 and 80533015.

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, 15041 + ... + 19679.

It is an arithmetic number, because the mean of its divisors is an integer number (2761728).

Almost surely, 2^80533040 is an apocalyptic number.

80533040 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 80533040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110469120).

80533040 is an abundant number, since it is smaller than the sum of its proper divisors (140405200).

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

80533040 is a wasteful number, since it uses less digits than its factorization.

80533040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690 (or 4684 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 80533040 is about 8974.0202807883. The cubic root of 80533040 is about 431.8418202320.

Adding to 80533040 its reverse (4033508), we get a palindrome (84566548).

The spelling of 80533040 in words is "eighty million, five hundred thirty-three thousand, forty".