81078324 has 24 divisors (see below), whose sum is σ = 190675968. Its totient is φ = 26812800.

The previous prime is 81078317. The next prime is 81078343. The reversal of 81078324 is 42387018.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 25077 + ... + 28124.

It is an arithmetic number, because the mean of its divisors is an integer number (7944832).

Almost surely, 2^81078324 is an apocalyptic number.

It is an amenable number.

81078324 is an abundant number, since it is smaller than the sum of its proper divisors (109597644).

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

81078324 is a wasteful number, since it uses less digits than its factorization.

81078324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53335 (or 53333 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 81078324 is about 9004.3502819471. The cubic root of 81078324 is about 432.8142863572.

The spelling of 81078324 in words is "eighty-one million, seventy-eight thousand, three hundred twenty-four".