728452864 has 18 divisors (see below), whose sum is σ = 1454060720. Its totient is φ = 364226304.

The previous prime is 728452861. The next prime is 728452871. The reversal of 728452864 is 468254827.

It is a super-4 number, since 4×728452864⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728452861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422504 + ... + 1423015.

Almost surely, 2^728452864 is an apocalyptic number.

It is an amenable number.

728452864 is a deficient number, since it is larger than the sum of its proper divisors (725607856).

728452864 is an equidigital number, since it uses as much as digits as its factorization.

728452864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845535 (or 2845521 counting only the distinct ones).

The product of its digits is 860160, while the sum is 46.

The square root of 728452864 is about 26989.8659500191. The cubic root of 728452864 is about 899.7747847993.

It can be divided in two parts, 728452 and 864, that added together give a square (729316 = 854²).

The spelling of 728452864 in words is "seven hundred twenty-eight million, four hundred fifty-two thousand, eight hundred sixty-four".