861769628 has 18 divisors (see below), whose sum is σ = 1540903728. Its totient is φ = 421520080.

The previous prime is 861769603. The next prime is 861769663. The reversal of 861769628 is 826967168.

It is a self number, because there is not a number n which added to its sum of digits gives 861769628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401438 + ... + 403578.

Almost surely, 2^861769628 is an apocalyptic number.

It is an amenable number.

861769628 is a deficient number, since it is larger than the sum of its proper divisors (679134100).

861769628 is an equidigital number, since it uses as much as digits as its factorization.

861769628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 2190 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 861769628 is about 29355.9129989173. The cubic root of 861769628 is about 951.6203659560.

The spelling of 861769628 in words is "eight hundred sixty-one million, seven hundred sixty-nine thousand, six hundred twenty-eight".