775620 has 72 divisors (see below), whose sum is σ = 2446080. Its totient is φ = 198720.

The previous prime is 775613. The next prime is 775627. The reversal of 775620 is 26577.

It is an interprime number because it is at equal distance from previous prime (775613) and next prime (775627).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (775627) by changing a digit.

775620 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 23 ways as a sum of consecutive naturals, for example, 5511 + ... + 5649.

2⁷⁷⁵⁶²⁰ 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 775620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223040).

775620 is an abundant number, since it is smaller than the sum of its proper divisors (1670460).

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

775620 is a wasteful number, since it uses less digits than its factorization.

775620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 775620 is about 880.6929090211. The cubic root of 775620 is about 91.8790155124.

It can be divided in two parts, 7756 and 20, that added together give a 5-th power (7776 = 6⁵).

The spelling of 775620 in words is "seven hundred seventy-five thousand, six hundred twenty".