71987258 has 8 divisors (see below), whose sum is σ = 123406752. Its totient is φ = 30851676.

The previous prime is 71987243. The next prime is 71987273. The reversal of 71987258 is 85278917.

It is an interprime number because it is at equal distance from previous prime (71987243) and next prime (71987273).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2570960 + ... + 2570987.

It is an arithmetic number, because the mean of its divisors is an integer number (15425844).

Almost surely, 2^71987258 is an apocalyptic number.

71987258 is a deficient number, since it is larger than the sum of its proper divisors (51419494).

71987258 is a wasteful number, since it uses less digits than its factorization.

71987258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141956.

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

The square root of 71987258 is about 8484.5305114661. The cubic root of 71987258 is about 415.9922220254.

The spelling of 71987258 in words is "seventy-one million, nine hundred eighty-seven thousand, two hundred fifty-eight".