844994887 has 16 divisors (see below), whose sum is σ = 929617920. Its totient is φ = 761702400.

The previous prime is 844994879. The next prime is 844994939. The reversal of 844994887 is 788499448.

It is a cyclic number.

It is not a de Polignac number, because 844994887 - 2³ = 844994879 is a prime.

It is a super-2 number, since 2×844994887² = 1428032718112285538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844994587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098439 + ... + 1099207.

It is an arithmetic number, because the mean of its divisors is an integer number (58101120).

Almost surely, 2^844994887 is an apocalyptic number.

844994887 is a deficient number, since it is larger than the sum of its proper divisors (84623033).

844994887 is a wasteful number, since it uses less digits than its factorization.

844994887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494.

The product of its digits is 18579456, while the sum is 61.

The square root of 844994887 is about 29068.7957610906. The cubic root of 844994887 is about 945.4052877436.

The spelling of 844994887 in words is "eight hundred forty-four million, nine hundred ninety-four thousand, eight hundred eighty-seven".