743438 has 4 divisors (see below), whose sum is σ = 1115160. Its totient is φ = 371718.

The previous prime is 743423. The next prime is 743447. The reversal of 743438 is 834347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834347 = 19 ⋅43913.

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 743438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185858 + ... + 185861.

It is an arithmetic number, because the mean of its divisors is an integer number (278790).

2⁷⁴³⁴³⁸ is an apocalyptic number.

743438 is a deficient number, since it is larger than the sum of its proper divisors (371722).

743438 is a wasteful number, since it uses less digits than its factorization.

743438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371721.

The product of its digits is 8064, while the sum is 29.

The square root of 743438 is about 862.2285079954. The cubic root of 743438 is about 90.5902765109.

Subtracting 743438 from its reverse (834347), we obtain a palindrome (90909).

The spelling of 743438 in words is "seven hundred forty-three thousand, four hundred thirty-eight".