728064730 has 8 divisors (see below), whose sum is σ = 1310516532. Its totient is φ = 291225888.

The previous prime is 728064713. The next prime is 728064731. The reversal of 728064730 is 37460827.

It can be written as a sum of positive squares in 2 ways, for example, as 660644209 + 67420521 = 25703^2 + 8211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 728064730.

It is not an unprimeable number, because it can be changed into a prime (728064731) 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, 36403227 + ... + 36403246.

Almost surely, 2^728064730 is an apocalyptic number.

728064730 is a deficient number, since it is larger than the sum of its proper divisors (582451802).

728064730 is a wasteful number, since it uses less digits than its factorization.

728064730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72806480.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 728064730 is about 26982.6746265080. The cubic root of 728064730 is about 899.6149505130.

It can be divided in two parts, 7280 and 64730, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 728064730 in words is "seven hundred twenty-eight million, sixty-four thousand, seven hundred thirty".