728213136 has 80 divisors (see below), whose sum is σ = 2202442368. Its totient is φ = 202982400.

The previous prime is 728213119. The next prime is 728213141. The reversal of 728213136 is 631312827.

728213136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 728213097 and 728213106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12655 + ... + 40206.

Almost surely, 2^728213136 is an apocalyptic number.

It is an amenable number.

728213136 is an abundant number, since it is smaller than the sum of its proper divisors (1474229232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728213136 is a wasteful number, since it uses less digits than its factorization.

728213136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52920 (or 52914 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 728213136 is about 26985.4245102796. The cubic root of 728213136 is about 899.6760710795.

It can be divided in two parts, 72821 and 3136, that added together give a palindrome (75957).

The spelling of 728213136 in words is "seven hundred twenty-eight million, two hundred thirteen thousand, one hundred thirty-six".