71428198 has 8 divisors (see below), whose sum is σ = 107178192. Its totient is φ = 35702136.

The previous prime is 71428183. The next prime is 71428207. The reversal of 71428198 is 89182417.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 71428198.

It is a congruent number.

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, 8311 + ... + 14557.

It is an arithmetic number, because the mean of its divisors is an integer number (13397274).

Almost surely, 2^71428198 is an apocalyptic number.

71428198 is a deficient number, since it is larger than the sum of its proper divisors (35749994).

71428198 is a wasteful number, since it uses less digits than its factorization.

71428198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11966.

The product of its digits is 32256, while the sum is 40.

The square root of 71428198 is about 8451.5204549241. The cubic root of 71428198 is about 414.9125436263.

The spelling of 71428198 in words is "seventy-one million, four hundred twenty-eight thousand, one hundred ninety-eight".