71871198 has 32 divisors (see below), whose sum is σ = 166364160. Its totient is φ = 20273760.

The previous prime is 71871197. The next prime is 71871203. The reversal of 71871198 is 89117817.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71871197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7513 + ... + 14148.

It is an arithmetic number, because the mean of its divisors is an integer number (5198880).

Almost surely, 2^71871198 is an apocalyptic number.

71871198 is an abundant number, since it is smaller than the sum of its proper divisors (94492962).

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

71871198 is a wasteful number, since it uses less digits than its factorization.

71871198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21752.

The product of its digits is 28224, while the sum is 42.

The square root of 71871198 is about 8477.6882462143. The cubic root of 71871198 is about 415.7685434279.

It can be divided in two parts, 7187 and 1198, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 71871198 in words is "seventy-one million, eight hundred seventy-one thousand, one hundred ninety-eight".