865768401 has 24 divisors (see below), whose sum is σ = 1325229984. Its totient is φ = 542770560.

The previous prime is 865768399. The next prime is 865768417. The reversal of 865768401 is 104867568.

It is a happy number.

It is not a de Polignac number, because 865768401 - 2¹ = 865768399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865768481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357886 + ... + 360296.

It is an arithmetic number, because the mean of its divisors is an integer number (55217916).

Almost surely, 2^865768401 is an apocalyptic number.

It is an amenable number.

865768401 is a deficient number, since it is larger than the sum of its proper divisors (459461583).

865768401 is a wasteful number, since it uses less digits than its factorization.

865768401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4778 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 865768401 is about 29423.9426488022. The cubic root of 865768401 is about 953.0899942797.

The spelling of 865768401 in words is "eight hundred sixty-five million, seven hundred sixty-eight thousand, four hundred one".