81348748 has 12 divisors (see below), whose sum is σ = 153311200. Its totient is φ = 37545552.

The previous prime is 81348737. The next prime is 81348809. The reversal of 81348748 is 84784318.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 782148 + ... + 782251.

Almost surely, 2^81348748 is an apocalyptic number.

It is an amenable number.

81348748 is a deficient number, since it is larger than the sum of its proper divisors (71962452).

81348748 is a wasteful number, since it uses less digits than its factorization.

81348748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564416 (or 1564414 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 81348748 is about 9019.3540788684. The cubic root of 81348748 is about 433.2949470270.

The spelling of 81348748 in words is "eighty-one million, three hundred forty-eight thousand, seven hundred forty-eight".