865772106 has 8 divisors (see below), whose sum is σ = 1731544224. Its totient is φ = 288590700.

The previous prime is 865772029. The next prime is 865772129. The reversal of 865772106 is 601277568.

It is a sphenic number, since it is the product of 3 distinct primes.

865772106 is an admirable number.

It is a super-2 number, since 2×865772106² = 1499122679055350472, 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, 72147670 + ... + 72147681.

It is an arithmetic number, because the mean of its divisors is an integer number (216443028).

Almost surely, 2^865772106 is an apocalyptic number.

865772106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

865772106 is a wasteful number, since it uses less digits than its factorization.

865772106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144295356.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 865772106 is about 29424.0056076667. The cubic root of 865772106 is about 953.0913538401.

The spelling of 865772106 in words is "eight hundred sixty-five million, seven hundred seventy-two thousand, one hundred six".