728354146 has 8 divisors (see below), whose sum is σ = 1176572124. Its totient is φ = 336163440.

The previous prime is 728354093. The next prime is 728354147. The reversal of 728354146 is 641453827.

It can be written as a sum of positive squares in 2 ways, for example, as 723341025 + 5013121 = 26895^2 + 2239^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 728354099 and 728354108.

It is not an unprimeable number, because it can be changed into a prime (728354147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14006785 + ... + 14006836.

Almost surely, 2^728354146 is an apocalyptic number.

728354146 is a deficient number, since it is larger than the sum of its proper divisors (448217978).

728354146 is a wasteful number, since it uses less digits than its factorization.

728354146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28013636.

The product of its digits is 161280, while the sum is 40.

The square root of 728354146 is about 26988.0370905333. The cubic root of 728354146 is about 899.7341379324.

The spelling of 728354146 in words is "seven hundred twenty-eight million, three hundred fifty-four thousand, one hundred forty-six".