81674888 has 32 divisors (see below), whose sum is σ = 157528800. Its totient is φ = 39677568.

The previous prime is 81674881. The next prime is 81674891. The reversal of 81674888 is 88847618.

It is not an unprimeable number, because it can be changed into a prime (81674881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79643 + ... + 80661.

It is an arithmetic number, because the mean of its divisors is an integer number (4922775).

Almost surely, 2^81674888 is an apocalyptic number.

It is an amenable number.

81674888 is a deficient number, since it is larger than the sum of its proper divisors (75853912).

81674888 is a wasteful number, since it uses less digits than its factorization.

81674888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1297 counting only the distinct ones).

The product of its digits is 688128, while the sum is 50.

The square root of 81674888 is about 9037.4160023759. The cubic root of 81674888 is about 433.8732242423.

The spelling of 81674888 in words is "eighty-one million, six hundred seventy-four thousand, eight hundred eighty-eight".