728174893 has 4 divisors (see below), whose sum is σ = 728229340. Its totient is φ = 728120448.

The previous prime is 728174869. The next prime is 728174899. The reversal of 728174893 is 398471827.

728174893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18645124 + 709529769 = 4318^2 + 26637^2 .

It is a cyclic number.

It is not a de Polignac number, because 728174893 - 2⁵ = 728174861 is a prime.

It is a super-2 number, since 2×728174893² = 1060477349591122898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728174899) 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, 8221 + ... + 39037.

It is an arithmetic number, because the mean of its divisors is an integer number (182057335).

Almost surely, 2^728174893 is an apocalyptic number.

It is an amenable number.

728174893 is a deficient number, since it is larger than the sum of its proper divisors (54447).

728174893 is a wasteful number, since it uses less digits than its factorization.

728174893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54446.

The product of its digits is 677376, while the sum is 49.

The square root of 728174893 is about 26984.7159147544. The cubic root of 728174893 is about 899.6603216088.

The spelling of 728174893 in words is "seven hundred twenty-eight million, one hundred seventy-four thousand, eight hundred ninety-three".