849868128 has 36 divisors (see below), whose sum is σ = 2416813308. Its totient is φ = 283289280.

The previous prime is 849868099. The next prime is 849868153. The reversal of 849868128 is 821868948.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1475178 + ... + 1475753.

It is an arithmetic number, because the mean of its divisors is an integer number (67133703).

Almost surely, 2^849868128 is an apocalyptic number.

It is an amenable number.

849868128 is an abundant number, since it is smaller than the sum of its proper divisors (1566945180).

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

849868128 is a wasteful number, since it uses less digits than its factorization.

849868128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950947 (or 2950936 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 54.

The square root of 849868128 is about 29152.4978003601. The cubic root of 849868128 is about 947.2192471398.

The spelling of 849868128 in words is "eight hundred forty-nine million, eight hundred sixty-eight thousand, one hundred twenty-eight".