81248858 has 8 divisors (see below), whose sum is σ = 122149728. Its totient is φ = 40532284.

The previous prime is 81248833. The next prime is 81248863. The reversal of 81248858 is 85884218.

It is a happy number.

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

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, 44966 + ... + 46737.

It is an arithmetic number, because the mean of its divisors is an integer number (15268716).

Almost surely, 2^81248858 is an apocalyptic number.

81248858 is a deficient number, since it is larger than the sum of its proper divisors (40900870).

81248858 is a wasteful number, since it uses less digits than its factorization.

81248858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92148.

The product of its digits is 163840, while the sum is 44.

The square root of 81248858 is about 9013.8148416750. The cubic root of 81248858 is about 433.1175234403.

The spelling of 81248858 in words is "eighty-one million, two hundred forty-eight thousand, eight hundred fifty-eight".