81349024 has 24 divisors (see below), whose sum is σ = 160392960. Its totient is φ = 40614336.

The previous prime is 81349007. The next prime is 81349027. The reversal of 81349024 is 42094318.

It is not an unprimeable number, because it can be changed into a prime (81349027) 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 3 ways as a sum of consecutive naturals, for example, 26817 + ... + 29695.

It is an arithmetic number, because the mean of its divisors is an integer number (6683040).

Almost surely, 2^81349024 is an apocalyptic number.

It is an amenable number.

81349024 is a deficient number, since it is larger than the sum of its proper divisors (79043936).

81349024 is a wasteful number, since it uses less digits than its factorization.

81349024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772 (or 3764 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 81349024 is about 9019.3693792859. The cubic root of 81349024 is about 433.2954370541.

The spelling of 81349024 in words is "eighty-one million, three hundred forty-nine thousand, twenty-four".