771630 has 48 divisors (see below), whose sum is σ = 1989360. Its totient is φ = 191488.

The previous prime is 771629. The next prime is 771637. The reversal of 771630 is 36177.

It is a self number, because there is not a number n which added to its sum of digits gives 771630.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 771630.

It is not an unprimeable number, because it can be changed into a prime (771637) by changing a digit.

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, 8626 + ... + 8714.

It is an arithmetic number, because the mean of its divisors is an integer number (41445).

2⁷⁷¹⁶³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994680).

771630 is an abundant number, since it is smaller than the sum of its proper divisors (1217730).

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

771630 is a wasteful number, since it uses less digits than its factorization.

771630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 771630 is about 878.4247264279. The cubic root of 771630 is about 91.7211943715.

The spelling of 771630 in words is "seven hundred seventy-one thousand, six hundred thirty".