742243728 has 20 divisors (see below), whose sum is σ = 1917463088. Its totient is φ = 247414560.

The previous prime is 742243703. The next prime is 742243739. The reversal of 742243728 is 827342247.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7731658 + ... + 7731753.

Almost surely, 2^742243728 is an apocalyptic number.

It is an amenable number.

742243728 is an abundant number, since it is smaller than the sum of its proper divisors (1175219360).

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

742243728 is a wasteful number, since it uses less digits than its factorization.

742243728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463422 (or 15463416 counting only the distinct ones).

The product of its digits is 150528, while the sum is 39.

The square root of 742243728 is about 27244.1503446153. The cubic root of 742243728 is about 905.4174190325.

The spelling of 742243728 in words is "seven hundred forty-two million, two hundred forty-three thousand, seven hundred twenty-eight".