743664 has 20 divisors (see below), whose sum is σ = 1921256. Its totient is φ = 247872.

The previous prime is 743657. The next prime is 743669. The reversal of 743664 is 466347.

743664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×743664² = 1106072289792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743669) by changing a digit.

743664 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 3 ways as a sum of consecutive naturals, for example, 7699 + ... + 7794.

2⁷⁴³⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

743664 is an abundant number, since it is smaller than the sum of its proper divisors (1177592).

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

743664 is a wasteful number, since it uses less digits than its factorization.

743664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15504 (or 15498 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 743664 is about 862.3595537825. The cubic root of 743664 is about 90.5994551863.

The spelling of 743664 in words is "seven hundred forty-three thousand, six hundred sixty-four".