724428128 has 24 divisors (see below), whose sum is σ = 1431384192. Its totient is φ = 360902016.

The previous prime is 724428127. The next prime is 724428241. The reversal of 724428128 is 821824427.

724428128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×724428128² = 1049592225275168768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 724428091 and 724428100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724428127) 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, 32000 + ... + 49727.

It is an arithmetic number, because the mean of its divisors is an integer number (59641008).

Almost surely, 2^724428128 is an apocalyptic number.

It is an amenable number.

724428128 is a deficient number, since it is larger than the sum of its proper divisors (706956064).

724428128 is a wasteful number, since it uses less digits than its factorization.

724428128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82014 (or 82006 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 724428128 is about 26915.2025442871. The cubic root of 724428128 is about 898.1146243499.

The spelling of 724428128 in words is "seven hundred twenty-four million, four hundred twenty-eight thousand, one hundred twenty-eight".