844006864 has 10 divisors (see below), whose sum is σ = 1635263330. Its totient is φ = 422003424.

The previous prime is 844006841. The next prime is 844006897. The reversal of 844006864 is 468600448.

It can be written as a sum of positive squares in only one way, i.e., 479960464 + 364046400 = 21908^2 + 19080^2 .

It is a super-2 number, since 2×844006864² = 1424695172958228992, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 26375199 + ... + 26375230.

It is an arithmetic number, because the mean of its divisors is an integer number (163526333).

Almost surely, 2^844006864 is an apocalyptic number.

It is an amenable number.

844006864 is a deficient number, since it is larger than the sum of its proper divisors (791256466).

844006864 is a wasteful number, since it uses less digits than its factorization.

844006864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52750437 (or 52750431 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 844006864 is about 29051.7962267396. The cubic root of 844006864 is about 945.0366675768.

The spelling of 844006864 in words is "eight hundred forty-four million, six thousand, eight hundred sixty-four".