864444442 has 8 divisors (see below), whose sum is σ = 1301249376. Its totient is φ = 430694652.

The previous prime is 864444433. The next prime is 864444457. The reversal of 864444442 is 244444468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 864444395 and 864444404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763078 + ... + 764209.

It is an arithmetic number, because the mean of its divisors is an integer number (162656172).

Almost surely, 2^864444442 is an apocalyptic number.

864444442 is a deficient number, since it is larger than the sum of its proper divisors (436804934).

864444442 is a wasteful number, since it uses less digits than its factorization.

864444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527572.

The product of its digits is 393216, while the sum is 40.

The square root of 864444442 is about 29401.4360533631. The cubic root of 864444442 is about 952.6039151535.

The spelling of 864444442 in words is "eight hundred sixty-four million, four hundred forty-four thousand, four hundred forty-two".