71878580 has 12 divisors (see below), whose sum is σ = 150945060. Its totient is φ = 28751424.

The previous prime is 71878561. The next prime is 71878589. The reversal of 71878580 is 8587817.

It can be written as a sum of positive squares in 2 ways, for example, as 43533604 + 28344976 = 6598^2 + 5324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71878589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796945 + ... + 1796984.

It is an arithmetic number, because the mean of its divisors is an integer number (12578755).

Almost surely, 2^71878580 is an apocalyptic number.

It is an amenable number.

71878580 is an abundant number, since it is smaller than the sum of its proper divisors (79066480).

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

71878580 is a wasteful number, since it uses less digits than its factorization.

71878580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593938 (or 3593936 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 71878580 is about 8478.1236131588. The cubic root of 71878580 is about 415.7827776803.

The spelling of 71878580 in words is "seventy-one million, eight hundred seventy-eight thousand, five hundred eighty".