71724680 has 16 divisors (see below), whose sum is σ = 161380620. Its totient is φ = 28689856.

The previous prime is 71724659. The next prime is 71724691. The reversal of 71724680 is 8642717.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64995844 + 6728836 = 8062^2 + 2594^2 .

It is a super-2 number, since 2×71724680² = 10288859442204800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71724680.

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 3 ways as a sum of consecutive naturals, for example, 896519 + ... + 896598.

Almost surely, 2^71724680 is an apocalyptic number.

It is an amenable number.

71724680 is an abundant number, since it is smaller than the sum of its proper divisors (89655940).

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

71724680 is a wasteful number, since it uses less digits than its factorization.

71724680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793128 (or 1793124 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 71724680 is about 8469.0424488250. The cubic root of 71724680 is about 415.4858199819.

The spelling of 71724680 in words is "seventy-one million, seven hundred twenty-four thousand, six hundred eighty".