864759942 has 64 divisors (see below), whose sum is σ = 1997568000. Its totient is φ = 277002720.

The previous prime is 864759913. The next prime is 864759953. The reversal of 864759942 is 249957468.

864759942 is a `hidden beast` number, since 8 + 6 + 4 + 7 + 599 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 247693 + ... + 251159.

It is an arithmetic number, because the mean of its divisors is an integer number (31212000).

Almost surely, 2^864759942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864759942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998784000).

864759942 is an abundant number, since it is smaller than the sum of its proper divisors (1132808058).

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

864759942 is a wasteful number, since it uses less digits than its factorization.

864759942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658 (or 3652 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 864759942 is about 29406.8009480800. The cubic root of 864759942 is about 952.7197930377.

The spelling of 864759942 in words is "eight hundred sixty-four million, seven hundred fifty-nine thousand, nine hundred forty-two".