743531728 has 60 divisors (see below), whose sum is σ = 1493095780. Its totient is φ = 358649856.

The previous prime is 743531713. The next prime is 743531749. The reversal of 743531728 is 827135347.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 346406544 + 397125184 = 18612^2 + 19928^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3852400 + ... + 3852592.

Almost surely, 2^743531728 is an apocalyptic number.

It is an amenable number.

743531728 is an abundant number, since it is smaller than the sum of its proper divisors (749564052).

743531728 is a wasteful number, since it uses less digits than its factorization.

743531728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 351 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 743531728 is about 27267.7782006529. The cubic root of 743531728 is about 905.9408336888.

The spelling of 743531728 in words is "seven hundred forty-three million, five hundred thirty-one thousand, seven hundred twenty-eight".