81280486 has 8 divisors (see below), whose sum is σ = 139338000. Its totient is φ = 34834488.

The previous prime is 81280483. The next prime is 81280513. The reversal of 81280486 is 68408218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81280483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902861 + ... + 2902888.

It is an arithmetic number, because the mean of its divisors is an integer number (17417250).

Almost surely, 2^81280486 is an apocalyptic number.

81280486 is a deficient number, since it is larger than the sum of its proper divisors (58057514).

81280486 is a wasteful number, since it uses less digits than its factorization.

81280486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805758.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 81280486 is about 9015.5690890814. The cubic root of 81280486 is about 433.1737164923.

The spelling of 81280486 in words is "eighty-one million, two hundred eighty thousand, four hundred eighty-six".