80641280 has 54 divisors (see below), whose sum is σ = 193933698. Its totient is φ = 32128000.

The previous prime is 80641279. The next prime is 80641307. The reversal of 80641280 is 8214608.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 16128256 = 8032^2 + 4016^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321155 + ... + 321405.

Almost surely, 2^80641280 is an apocalyptic number.

80641280 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 80641280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96966849).

80641280 is an abundant number, since it is smaller than the sum of its proper divisors (113292418).

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

80641280 is an frugal number, since it uses more digits than its factorization.

80641280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 80641280 is about 8980.0489976392. The cubic root of 80641280 is about 432.0352051785.

Adding to 80641280 its reverse (8214608), we get a palindrome (88855888).

The spelling of 80641280 in words is "eighty million, six hundred forty-one thousand, two hundred eighty".