81344748 has 24 divisors (see below), whose sum is σ = 190013040. Its totient is φ = 27085120.

The previous prime is 81344737. The next prime is 81344801. The reversal of 81344748 is 84744318.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9538 + ... + 15926.

It is an arithmetic number, because the mean of its divisors is an integer number (7917210).

Almost surely, 2^81344748 is an apocalyptic number.

It is an amenable number.

81344748 is an abundant number, since it is smaller than the sum of its proper divisors (108668292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81344748 is a wasteful number, since it uses less digits than its factorization.

81344748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7457 (or 7455 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 81344748 is about 9019.1323307733. The cubic root of 81344748 is about 433.2878450608.

The spelling of 81344748 in words is "eighty-one million, three hundred forty-four thousand, seven hundred forty-eight".