81347348 has 24 divisors (see below), whose sum is σ = 147517440. Its totient is φ = 39209760.

The previous prime is 81347347. The next prime is 81347351. The reversal of 81347348 is 84374318.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81347347) 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, 35213 + ... + 37451.

It is an arithmetic number, because the mean of its divisors is an integer number (6146560).

Almost surely, 2^81347348 is an apocalyptic number.

It is an amenable number.

81347348 is a deficient number, since it is larger than the sum of its proper divisors (66170092).

81347348 is a wasteful number, since it uses less digits than its factorization.

81347348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567 (or 2565 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 81347348 is about 9019.2764676553. The cubic root of 81347348 is about 433.2924613653.

The spelling of 81347348 in words is "eighty-one million, three hundred forty-seven thousand, three hundred forty-eight".