745744 has 20 divisors (see below), whose sum is σ = 1460224. Its totient is φ = 368928.

The previous prime is 745741. The next prime is 745747. The reversal of 745744 is 447547.

It is an interprime number because it is at equal distance from previous prime (745741) and next prime (745747).

It is a super-2 number, since 2×745744² = 1112268227072, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (745741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849 + ... + 2215.

2⁷⁴⁵⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

745744 is a deficient number, since it is larger than the sum of its proper divisors (714480).

745744 is a wasteful number, since it uses less digits than its factorization.

745744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 496 counting only the distinct ones).

The product of its digits is 15680, while the sum is 31.

The square root of 745744 is about 863.5647051611. The cubic root of 745744 is about 90.6838443040.

The spelling of 745744 in words is "seven hundred forty-five thousand, seven hundred forty-four".