743490728 has 16 divisors (see below), whose sum is σ = 1431722580. Its totient is φ = 361698048.

The previous prime is 743490703. The next prime is 743490739. The reversal of 743490728 is 827094347.

It can be written as a sum of positive squares in 2 ways, for example, as 739948804 + 3541924 = 27202^2 + 1882^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 1255601 + ... + 1256192.

Almost surely, 2^743490728 is an apocalyptic number.

It is an amenable number.

743490728 is a deficient number, since it is larger than the sum of its proper divisors (688231852).

743490728 is a wasteful number, since it uses less digits than its factorization.

743490728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511836 (or 2511832 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 743490728 is about 27267.0263871952. The cubic root of 743490728 is about 905.9241815158.

The spelling of 743490728 in words is "seven hundred forty-three million, four hundred ninety thousand, seven hundred twenty-eight".