743878 has 4 divisors (see below), whose sum is σ = 1115820. Its totient is φ = 371938.

The previous prime is 743851. The next prime is 743881. The reversal of 743878 is 878347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878347 = 23 ⋅38189.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185968 + ... + 185971.

It is an arithmetic number, because the mean of its divisors is an integer number (278955).

2⁷⁴³⁸⁷⁸ is an apocalyptic number.

743878 is a deficient number, since it is larger than the sum of its proper divisors (371942).

743878 is a wasteful number, since it uses less digits than its factorization.

743878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371941.

The product of its digits is 37632, while the sum is 37.

The square root of 743878 is about 862.4836230329. The cubic root of 743878 is about 90.6081447845.

The spelling of 743878 in words is "seven hundred forty-three thousand, eight hundred seventy-eight".