745648 has 20 divisors (see below), whose sum is σ = 1495440. Its totient is φ = 359744.

The previous prime is 745631. The next prime is 745649. The reversal of 745648 is 846547.

It is not an unprimeable number, because it can be changed into a prime (745649) by changing a digit.

745648 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, 340 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (74772).

2⁷⁴⁵⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

745648 is an abundant number, since it is smaller than the sum of its proper divisors (749792).

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

745648 is a wasteful number, since it uses less digits than its factorization.

745648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1638 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 745648 is about 863.5091198129. The cubic root of 745648 is about 90.6799528780.

The spelling of 745648 in words is "seven hundred forty-five thousand, six hundred forty-eight".