770144 has 24 divisors (see below), whose sum is σ = 1555848. Its totient is φ = 375040.

The previous prime is 770129. The next prime is 770167. The reversal of 770144 is 441077.

It is a congruent number.

It is an unprimeable number.

770144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1019 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (64827).

2⁷⁷⁰¹⁴⁴ 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 770144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777924).

770144 is an abundant number, since it is smaller than the sum of its proper divisors (785704).

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

770144 is a wasteful number, since it uses less digits than its factorization.

770144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 770144 is about 877.5784865184. The cubic root of 770144 is about 91.6622778431.

The spelling of 770144 in words is "seven hundred seventy thousand, one hundred forty-four", and thus it is an iban number.