861775268 has 12 divisors (see below), whose sum is σ = 1540194432. Its totient is φ = 421719720.

The previous prime is 861775259. The next prime is 861775333. The reversal of 861775268 is 862577168.

It is a super-2 number, since 2×861775268² = 1485313225072943648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2291768 + ... + 2292143.

It is an arithmetic number, because the mean of its divisors is an integer number (128349536).

Almost surely, 2^861775268 is an apocalyptic number.

It is an amenable number.

861775268 is a deficient number, since it is larger than the sum of its proper divisors (678419164).

861775268 is a wasteful number, since it uses less digits than its factorization.

861775268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583962 (or 4583960 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The square root of 861775268 is about 29356.0090611786. The cubic root of 861775268 is about 951.6224419661.

The spelling of 861775268 in words is "eight hundred sixty-one million, seven hundred seventy-five thousand, two hundred sixty-eight".