81238862 has 8 divisors (see below), whose sum is σ = 122015496. Its totient is φ = 40567032.

The previous prime is 81238849. The next prime is 81238873. The reversal of 81238862 is 26883218.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24233 + ... + 27380.

It is an arithmetic number, because the mean of its divisors is an integer number (15251937).

Almost surely, 2^81238862 is an apocalyptic number.

81238862 is a deficient number, since it is larger than the sum of its proper divisors (40776634).

81238862 is a wasteful number, since it uses less digits than its factorization.

81238862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52402.

The product of its digits is 36864, while the sum is 38.

The square root of 81238862 is about 9013.2603424066. The cubic root of 81238862 is about 433.0997606457.

The spelling of 81238862 in words is "eighty-one million, two hundred thirty-eight thousand, eight hundred sixty-two".