71427198 has 8 divisors (see below), whose sum is σ = 142854408. Its totient is φ = 23809064.

The previous prime is 71427179. The next prime is 71427233. The reversal of 71427198 is 89172417.

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

71427198 is an admirable number.

It is a super-2 number, since 2×71427198² = 10203689228262408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5952261 + ... + 5952272.

It is an arithmetic number, because the mean of its divisors is an integer number (17856801).

Almost surely, 2^71427198 is an apocalyptic number.

71427198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71427198 is a wasteful number, since it uses less digits than its factorization.

71427198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904538.

The product of its digits is 28224, while the sum is 39.

The square root of 71427198 is about 8451.4612937645. The cubic root of 71427198 is about 414.9106073486.

It can be divided in two parts, 7 and 1427198, that added together give a triangular number (1427205 = T₁₆₈₉).

The spelling of 71427198 in words is "seventy-one million, four hundred twenty-seven thousand, one hundred ninety-eight".