71728195 has 24 divisors (see below), whose sum is σ = 108132192. Its totient is φ = 44711040.

The previous prime is 71728193. The next prime is 71728207. The reversal of 71728195 is 59182717.

It is not a de Polignac number, because 71728195 - 2¹ = 71728193 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71728193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4234 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (4505508).

Almost surely, 2^71728195 is an apocalyptic number.

71728195 is the 4235-th decagonal number.

71728195 is a deficient number, since it is larger than the sum of its proper divisors (36403997).

71728195 is a wasteful number, since it uses less digits than its factorization.

71728195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16971 (or 16960 counting only the distinct ones).

The product of its digits is 35280, while the sum is 40.

The square root of 71728195 is about 8469.2499667916. The cubic root of 71728195 is about 415.4926070868.

The spelling of 71728195 in words is "seventy-one million, seven hundred twenty-eight thousand, one hundred ninety-five".