864276440 has 32 divisors (see below), whose sum is σ = 1955502000. Its totient is φ = 343776384.

The previous prime is 864276409. The next prime is 864276443. The reversal of 864276440 is 44672468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864276443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53195 + ... + 67514.

Almost surely, 2^864276440 is an apocalyptic number.

It is an amenable number.

864276440 is an abundant number, since it is smaller than the sum of its proper divisors (1091225560).

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

864276440 is a wasteful number, since it uses less digits than its factorization.

864276440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120899 (or 120895 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The square root of 864276440 is about 29398.5788772179. The cubic root of 864276440 is about 952.5421993185.

The spelling of 864276440 in words is "eight hundred sixty-four million, two hundred seventy-six thousand, four hundred forty".