745408 has 28 divisors (see below), whose sum is σ = 1559560. Its totient is φ = 352512.

The previous prime is 745397. The next prime is 745471. The reversal of 745408 is 804547.

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 in 3 ways as a sum of consecutive naturals, for example, 910 + ... + 1522.

2⁷⁴⁵⁴⁰⁸ 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 745408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779780).

745408 is an abundant number, since it is smaller than the sum of its proper divisors (814152).

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

745408 is a wasteful number, since it uses less digits than its factorization.

745408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 745408 is about 863.3701407855. The cubic root of 745408 is about 90.6702228517.

The spelling of 745408 in words is "seven hundred forty-five thousand, four hundred eight".