776420 has 12 divisors (see below), whose sum is σ = 1630524. Its totient is φ = 310560.

The previous prime is 776401. The next prime is 776429. The reversal of 776420 is 24677.

It can be written as a sum of positive squares in 2 ways, for example, as 376996 + 399424 = 614^2 + 632^2 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 776420.

It is not an unprimeable number, because it can be changed into a prime (776429) by changing a digit.

776420 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19391 + ... + 19430.

It is an arithmetic number, because the mean of its divisors is an integer number (135877).

2⁷⁷⁶⁴²⁰ is an apocalyptic number.

It is an amenable number.

776420 is an abundant number, since it is smaller than the sum of its proper divisors (854104).

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

776420 is a wasteful number, since it uses less digits than its factorization.

776420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38830 (or 38828 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 776420 is about 881.1469797940. The cubic root of 776420 is about 91.9105936717.

The spelling of 776420 in words is "seven hundred seventy-six thousand, four hundred twenty".