770240 has 56 divisors (see below), whose sum is σ = 1920240. Its totient is φ = 293888.

The previous prime is 770239. The next prime is 770261. The reversal of 770240 is 42077.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 9239 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (34290).

2⁷⁷⁰²⁴⁰ 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 770240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960120).

770240 is an abundant number, since it is smaller than the sum of its proper divisors (1150000).

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

770240 is a wasteful number, since it uses less digits than its factorization.

770240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 770240 is about 877.6331807766. The cubic root of 770240 is about 91.6660863140. Note that the first 3 decimals are identical.

The spelling of 770240 in words is "seven hundred seventy thousand, two hundred forty", and thus it is an iban number.