745770 has 16 divisors (see below), whose sum is σ = 1789920. Its totient is φ = 198864.

The previous prime is 745757. The next prime is 745817. The reversal of 745770 is 77547.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 24859 = 745770 / (7 + 4 + 5 + 7 + 7 + 0).

It is an unprimeable number.

745770 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 7 ways as a sum of consecutive naturals, for example, 12400 + ... + 12459.

It is an arithmetic number, because the mean of its divisors is an integer number (111870).

2⁷⁴⁵⁷⁷⁰ is an apocalyptic number.

745770 is an abundant number, since it is smaller than the sum of its proper divisors (1044150).

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

745770 is a wasteful number, since it uses less digits than its factorization.

745770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24869.

The product of its (nonzero) digits is 6860, while the sum is 30.

The square root of 745770 is about 863.5797589105. The cubic root of 745770 is about 90.6848981743.

The spelling of 745770 in words is "seven hundred forty-five thousand, seven hundred seventy".