81449262 has 12 divisors (see below), whose sum is σ = 176473440. Its totient is φ = 27149748.

The previous prime is 81449243. The next prime is 81449273. The reversal of 81449262 is 26294418.

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, 2262462 + ... + 2262497.

It is an arithmetic number, because the mean of its divisors is an integer number (14706120).

Almost surely, 2^81449262 is an apocalyptic number.

81449262 is an abundant number, since it is smaller than the sum of its proper divisors (95024178).

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

81449262 is a wasteful number, since it uses less digits than its factorization.

81449262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524967 (or 4524964 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 81449262 is about 9024.9244872187. The cubic root of 81449262 is about 433.4733324112.

The spelling of 81449262 in words is "eighty-one million, four hundred forty-nine thousand, two hundred sixty-two".