71939080 has 32 divisors (see below), whose sum is σ = 163540440. Its totient is φ = 28477440.

The previous prime is 71939071. The next prime is 71939083. The reversal of 71939080 is 8093917.

It can be written as a sum of positive squares in 4 ways, for example, as 55145476 + 16793604 = 7426^2 + 4098^2 .

It is not an unprimeable number, because it can be changed into a prime (71939083) 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, 5391 + ... + 13150.

Almost surely, 2^71939080 is an apocalyptic number.

It is an amenable number.

71939080 is an abundant number, since it is smaller than the sum of its proper divisors (91601360).

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

71939080 is a wasteful number, since it uses less digits than its factorization.

71939080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649 (or 18645 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 71939080 is about 8481.6908691605. The cubic root of 71939080 is about 415.8993993672.

The spelling of 71939080 in words is "seventy-one million, nine hundred thirty-nine thousand, eighty".