728163740 has 12 divisors (see below), whose sum is σ = 1529143896. Its totient is φ = 291265488.

The previous prime is 728163727. The next prime is 728163749. The reversal of 728163740 is 47361827.

It is a junction number, because it is equal to n+sod(n) for n = 728163694 and 728163703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728163749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18204074 + ... + 18204113.

It is an arithmetic number, because the mean of its divisors is an integer number (127428658).

Almost surely, 2^728163740 is an apocalyptic number.

It is an amenable number.

728163740 is an abundant number, since it is smaller than the sum of its proper divisors (800980156).

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

728163740 is a wasteful number, since it uses less digits than its factorization.

728163740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36408196 (or 36408194 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 728163740 is about 26984.5092599439. The cubic root of 728163740 is about 899.6557284070.

The spelling of 728163740 in words is "seven hundred twenty-eight million, one hundred sixty-three thousand, seven hundred forty".