740728 has 16 divisors (see below), whose sum is σ = 1415880. Its totient is φ = 363168.

The previous prime is 740717. The next prime is 740737. The reversal of 740728 is 827047.

It is a junction number, because it is equal to n+sod(n) for n = 740696 and 740705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450 + ... + 1297.

2⁷⁴⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

740728 is a deficient number, since it is larger than the sum of its proper divisors (675152).

740728 is a wasteful number, since it uses less digits than its factorization.

740728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 740728 is about 860.6555640905. The cubic root of 740728 is about 90.4800684615.

The spelling of 740728 in words is "seven hundred forty thousand, seven hundred twenty-eight".