728157371 has 4 divisors (see below), whose sum is σ = 728278512. Its totient is φ = 728036232.

The previous prime is 728157359. The next prime is 728157377. The reversal of 728157371 is 173751827.

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

It is a cyclic number.

It is not a de Polignac number, because 728157371 - 2¹⁸ = 727895227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728157377) 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, 51056 + ... + 63741.

It is an arithmetic number, because the mean of its divisors is an integer number (182069628).

Almost surely, 2^728157371 is an apocalyptic number.

728157371 is a deficient number, since it is larger than the sum of its proper divisors (121141).

728157371 is a wasteful number, since it uses less digits than its factorization.

728157371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121140.

The product of its digits is 82320, while the sum is 41.

The square root of 728157371 is about 26984.3912475342. The cubic root of 728157371 is about 899.6531054053.

The spelling of 728157371 in words is "seven hundred twenty-eight million, one hundred fifty-seven thousand, three hundred seventy-one".