81276838 has 8 divisors (see below), whose sum is σ = 122261688. Its totient is φ = 40522944.

The previous prime is 81276817. The next prime is 81276841. The reversal of 81276838 is 83867218.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 81276794 and 81276803.

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, 56856 + ... + 58267.

It is an arithmetic number, because the mean of its divisors is an integer number (15282711).

Almost surely, 2^81276838 is an apocalyptic number.

81276838 is a deficient number, since it is larger than the sum of its proper divisors (40984850).

81276838 is a wasteful number, since it uses less digits than its factorization.

81276838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115478.

The product of its digits is 129024, while the sum is 43.

The square root of 81276838 is about 9015.3667701320. The cubic root of 81276838 is about 433.1672358825.

The spelling of 81276838 in words is "eighty-one million, two hundred seventy-six thousand, eight hundred thirty-eight".