743920 has 40 divisors (see below), whose sum is σ = 1834704. Its totient is φ = 279552.

The previous prime is 743917. The next prime is 743921. The reversal of 743920 is 29347.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743921) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1087 + ... + 1633.

2⁷⁴³⁹²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 743920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917352).

743920 is an abundant number, since it is smaller than the sum of its proper divisors (1090784).

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

743920 is a wasteful number, since it uses less digits than its factorization.

743920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 743920 is about 862.5079709777. The cubic root of 743920 is about 90.6098500240.

The spelling of 743920 in words is "seven hundred forty-three thousand, nine hundred twenty".