80872440 has 128 divisors (see below), whose sum is σ = 266872320. Its totient is φ = 19443200.

The previous prime is 80872433. The next prime is 80872453. The reversal of 80872440 is 4427808.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259885 + ... + 260195.

It is an arithmetic number, because the mean of its divisors is an integer number (2084940).

Almost surely, 2^80872440 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 80872440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133436160).

80872440 is an abundant number, since it is smaller than the sum of its proper divisors (185999880).

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

80872440 is a wasteful number, since it uses less digits than its factorization.

80872440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 80872440 is about 8992.9105410874. The cubic root of 80872440 is about 432.4476241608.

The spelling of 80872440 in words is "eighty million, eight hundred seventy-two thousand, four hundred forty".