743378506 has 16 divisors (see below), whose sum is σ = 1201358088. Its totient is φ = 342950400.

The previous prime is 743378437. The next prime is 743378521. The reversal of 743378506 is 605873347.

It can be written as a sum of positive squares in 4 ways, for example, as 182115025 + 561263481 = 13495^2 + 23691^2 .

It is a super-2 number, since 2×743378506² = 1105223206365584072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76566 + ... + 85726.

Almost surely, 2^743378506 is an apocalyptic number.

743378506 is a deficient number, since it is larger than the sum of its proper divisors (457979582).

743378506 is a wasteful number, since it uses less digits than its factorization.

743378506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 743378506 is about 27264.9684760500. The cubic root of 743378506 is about 905.8785993563.

The spelling of 743378506 in words is "seven hundred forty-three million, three hundred seventy-eight thousand, five hundred six".