865408011 has 8 divisors (see below), whose sum is σ = 1242637200. Its totient is φ = 532558752.

The previous prime is 865407923. The next prime is 865408013. The reversal of 865408011 is 110804568.

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

It is not a de Polignac number, because 865408011 - 2¹⁴ = 865391627 is a prime.

It is a super-2 number, since 2×865408011² = 1497862051005952242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (865408013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11094936 + ... + 11095013.

It is an arithmetic number, because the mean of its divisors is an integer number (155329650).

Almost surely, 2^865408011 is an apocalyptic number.

865408011 is a deficient number, since it is larger than the sum of its proper divisors (377229189).

865408011 is a wasteful number, since it uses less digits than its factorization.

865408011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22189965.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 865408011 is about 29417.8179170380. The cubic root of 865408011 is about 952.9577295871.

The spelling of 865408011 in words is "eight hundred sixty-five million, four hundred eight thousand, eleven".