743818 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 345280.

The previous prime is 743803. The next prime is 743819. The reversal of 743818 is 818347.

It is a happy number.

743818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 743818.

It is not an unprimeable number, because it can be changed into a prime (743819) by changing a digit.

743818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4371 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁷⁴³⁸¹⁸ is an apocalyptic number.

743818 is a deficient number, since it is larger than the sum of its proper divisors (453686).

743818 is a wasteful number, since it uses less digits than its factorization.

743818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 5376, while the sum is 31.

The square root of 743818 is about 862.4488390624. The cubic root of 743818 is about 90.6057086167.

Subtracting 743818 from its reverse (818347), we obtain a square (74529 = 273²).

The spelling of 743818 in words is "seven hundred forty-three thousand, eight hundred eighteen".