728644652 has 12 divisors (see below), whose sum is σ = 1276653840. Its totient is φ = 363886416.

The previous prime is 728644649. The next prime is 728644703. The reversal of 728644652 is 256446827.

It is a super-2 number, since 2×728644652² = 1061846057776402208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105203 + ... + 111914.

It is an arithmetic number, because the mean of its divisors is an integer number (106387820).

Almost surely, 2^728644652 is an apocalyptic number.

It is an amenable number.

728644652 is a deficient number, since it is larger than the sum of its proper divisors (548009188).

728644652 is a wasteful number, since it uses less digits than its factorization.

728644652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217960 (or 217958 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 728644652 is about 26993.4186793744. The cubic root of 728644652 is about 899.8537424884.

The spelling of 728644652 in words is "seven hundred twenty-eight million, six hundred forty-four thousand, six hundred fifty-two".