81282838 has 16 divisors (see below), whose sum is σ = 150060960. Its totient is φ = 32155776.

The previous prime is 81282829. The next prime is 81282841. The reversal of 81282838 is 83828218.

It is a self number, because there is not a number n which added to its sum of digits gives 81282838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223123 + ... + 223486.

It is an arithmetic number, because the mean of its divisors is an integer number (9378810).

Almost surely, 2^81282838 is an apocalyptic number.

81282838 is a deficient number, since it is larger than the sum of its proper divisors (68778122).

81282838 is a wasteful number, since it uses less digits than its factorization.

81282838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446631.

The product of its digits is 49152, while the sum is 40.

The square root of 81282838 is about 9015.6995291547. The cubic root of 81282838 is about 433.1778946775.

The spelling of 81282838 in words is "eighty-one million, two hundred eighty-two thousand, eight hundred thirty-eight".