865540422 has 24 divisors (see below), whose sum is σ = 1921079160. Its totient is φ = 281476320.

The previous prime is 865540411. The next prime is 865540427. The reversal of 865540422 is 224045568.

It is a happy number.

865540422 is a `hidden beast` number, since 86 + 554 + 0 + 4 + 22 = 666.

865540422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865540427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585672 + ... + 587147.

It is an arithmetic number, because the mean of its divisors is an integer number (80044965).

Almost surely, 2^865540422 is an apocalyptic number.

865540422 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

865540422 is an abundant number, since it is smaller than the sum of its proper divisors (1055538738).

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

865540422 is a wasteful number, since it uses less digits than its factorization.

865540422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172868 (or 1172865 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 865540422 is about 29420.0683547812. The cubic root of 865540422 is about 953.0063292647.

The spelling of 865540422 in words is "eight hundred sixty-five million, five hundred forty thousand, four hundred twenty-two".