770720 has 24 divisors (see below), whose sum is σ = 1821204. Its totient is φ = 308224.

The previous prime is 770669. The next prime is 770741. The reversal of 770720 is 27077.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 71824 = 836^2 + 268^2 .

It is an unprimeable number.

770720 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, 2249 + ... + 2568.

2⁷⁷⁰⁷²⁰ is an apocalyptic number.

It is an amenable number.

770720 is an abundant number, since it is smaller than the sum of its proper divisors (1050484).

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

770720 is a wasteful number, since it uses less digits than its factorization.

770720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832 (or 4824 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 23.

The square root of 770720 is about 877.9066009548. The cubic root of 770720 is about 91.6851239234.

Adding to 770720 its reverse (27077), we get a palindrome (797797).

The spelling of 770720 in words is "seven hundred seventy thousand, seven hundred twenty", and thus it is an iban number.