71978852 has 24 divisors (see below), whose sum is σ = 138083232. Its totient is φ = 32558400.

The previous prime is 71978849. The next prime is 71978857. The reversal of 71978852 is 25887917.

It is a junction number, because it is equal to n+sod(n) for n = 71978797 and 71978806.

It is not an unprimeable number, because it can be changed into a prime (71978857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5408 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (5753468).

Almost surely, 2^71978852 is an apocalyptic number.

It is an amenable number.

71978852 is a deficient number, since it is larger than the sum of its proper divisors (66104380).

71978852 is a wasteful number, since it uses less digits than its factorization.

71978852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979 (or 7977 counting only the distinct ones).

The product of its digits is 282240, while the sum is 47.

The square root of 71978852 is about 8484.0351248684. The cubic root of 71978852 is about 415.9760294990.

The spelling of 71978852 in words is "seventy-one million, nine hundred seventy-eight thousand, eight hundred fifty-two".