71978324 has 24 divisors (see below), whose sum is σ = 138348000. Its totient is φ = 32494880.

The previous prime is 71978317. The next prime is 71978341. The reversal of 71978324 is 42387917.

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, 1067 + ... + 12045.

It is an arithmetic number, because the mean of its divisors is an integer number (5764500).

Almost surely, 2^71978324 is an apocalyptic number.

It is an amenable number.

71978324 is a deficient number, since it is larger than the sum of its proper divisors (66369676).

71978324 is a wasteful number, since it uses less digits than its factorization.

71978324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11143 (or 11141 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 71978324 is about 8484.0040075427. The cubic root of 71978324 is about 415.9750123675.

The spelling of 71978324 in words is "seventy-one million, nine hundred seventy-eight thousand, three hundred twenty-four".