81280062 has 48 divisors (see below), whose sum is σ = 189720960. Its totient is φ = 25065936.

The previous prime is 81280049. The next prime is 81280079. The reversal of 81280062 is 26008218.

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, 11943 + ... + 17469.

It is an arithmetic number, because the mean of its divisors is an integer number (3952520).

Almost surely, 2^81280062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81280062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94860480).

81280062 is an abundant number, since it is smaller than the sum of its proper divisors (108440898).

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

81280062 is a wasteful number, since it uses less digits than its factorization.

81280062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597 (or 5594 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81280062 is about 9015.5455741735. The cubic root of 81280062 is about 433.1729632735.

The spelling of 81280062 in words is "eighty-one million, two hundred eighty thousand, sixty-two".