864278742 has 16 divisors (see below), whose sum is σ = 1830237552. Its totient is φ = 271146240.

The previous prime is 864278711. The next prime is 864278743. The reversal of 864278742 is 247872468.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 864278691 and 864278700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864278743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4236559 + ... + 4236762.

It is an arithmetic number, because the mean of its divisors is an integer number (114389847).

Almost surely, 2^864278742 is an apocalyptic number.

864278742 is an abundant number, since it is smaller than the sum of its proper divisors (965958810).

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

864278742 is a wasteful number, since it uses less digits than its factorization.

864278742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8473343.

The product of its digits is 1204224, while the sum is 48.

The square root of 864278742 is about 29398.6180287441. The cubic root of 864278742 is about 952.5430450163.

The spelling of 864278742 in words is "eight hundred sixty-four million, two hundred seventy-eight thousand, seven hundred forty-two".