844921916 has 6 divisors (see below), whose sum is σ = 1478613360. Its totient is φ = 422460956.

The previous prime is 844921901. The next prime is 844921927. The reversal of 844921916 is 619129448.

It is a super-2 number, since 2×844921916² = 1427786088274222112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615236 + ... + 105615243.

It is an arithmetic number, because the mean of its divisors is an integer number (246435560).

Almost surely, 2^844921916 is an apocalyptic number.

It is an amenable number.

844921916 is a deficient number, since it is larger than the sum of its proper divisors (633691444).

844921916 is a wasteful number, since it uses less digits than its factorization.

844921916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211230483 (or 211230481 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 844921916 is about 29067.5405908377. The cubic root of 844921916 is about 945.3780729220.

The spelling of 844921916 in words is "eight hundred forty-four million, nine hundred twenty-one thousand, nine hundred sixteen".