71938680 has 64 divisors (see below), whose sum is σ = 235440000. Its totient is φ = 17439360.

The previous prime is 71938667. The next prime is 71938681. The reversal of 71938680 is 8683917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71938681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25930 + ... + 28569.

It is an arithmetic number, because the mean of its divisors is an integer number (3678750).

Almost surely, 2^71938680 is an apocalyptic number.

It is an amenable number.

71938680 is an abundant number, since it is smaller than the sum of its proper divisors (163501320).

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

71938680 is a wasteful number, since it uses less digits than its factorization.

71938680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54524 (or 54520 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 71938680 is about 8481.6672889238. The cubic root of 71938680 is about 415.8986285294.

The spelling of 71938680 in words is "seventy-one million, nine hundred thirty-eight thousand, six hundred eighty".