71728346 has 4 divisors (see below), whose sum is σ = 107592522. Its totient is φ = 35864172.

The previous prime is 71728333. The next prime is 71728357. The reversal of 71728346 is 64382717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71149225 + 579121 = 8435^2 + 761^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17932085 + ... + 17932088.

Almost surely, 2^71728346 is an apocalyptic number.

71728346 is a deficient number, since it is larger than the sum of its proper divisors (35864176).

71728346 is a wasteful number, since it uses less digits than its factorization.

71728346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35864175.

The product of its digits is 56448, while the sum is 38.

The square root of 71728346 is about 8469.2588813898. The cubic root of 71728346 is about 415.4928986474.

The spelling of 71728346 in words is "seventy-one million, seven hundred twenty-eight thousand, three hundred forty-six".