80581400 has 96 divisors (see below), whose sum is σ = 198737280. Its totient is φ = 30336000.

The previous prime is 80581387. The next prime is 80581421. The reversal of 80581400 is 418508.

It is a self number, because there is not a number n which added to its sum of digits gives 80581400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254042 + ... + 254358.

It is an arithmetic number, because the mean of its divisors is an integer number (2070180).

Almost surely, 2^80581400 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 80581400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99368640).

80581400 is an abundant number, since it is smaller than the sum of its proper divisors (118155880).

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

80581400 is a wasteful number, since it uses less digits than its factorization.

80581400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 80581400 is about 8976.7143209529. The cubic root of 80581400 is about 431.9282431113.

Adding to 80581400 its reverse (418508), we get a palindrome (80999908).

The spelling of 80581400 in words is "eighty million, five hundred eighty-one thousand, four hundred".