728320074 has 8 divisors (see below), whose sum is σ = 1456640160. Its totient is φ = 242773356.

The previous prime is 728320067. The next prime is 728320081. The reversal of 728320074 is 470023827.

It is an interprime number because it is at equal distance from previous prime (728320067) and next prime (728320081).

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

728320074 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60693334 + ... + 60693345.

It is an arithmetic number, because the mean of its divisors is an integer number (182080020).

Almost surely, 2^728320074 is an apocalyptic number.

728320074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

728320074 is a wasteful number, since it uses less digits than its factorization.

728320074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121386684.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 728320074 is about 26987.4058405027. The cubic root of 728320074 is about 899.7201080268.

The spelling of 728320074 in words is "seven hundred twenty-eight million, three hundred twenty thousand, seventy-four".