849343978 has 16 divisors (see below), whose sum is σ = 1463567040. Its totient is φ = 362117376.

The previous prime is 849343973. The next prime is 849343993. The reversal of 849343978 is 879343948.

It is not an unprimeable number, because it can be changed into a prime (849343973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154468 + ... + 159871.

It is an arithmetic number, because the mean of its divisors is an integer number (91472940).

Almost surely, 2^849343978 is an apocalyptic number.

849343978 is a deficient number, since it is larger than the sum of its proper divisors (614223062).

849343978 is a wasteful number, since it uses less digits than its factorization.

849343978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314541.

The product of its digits is 5225472, while the sum is 55.

The square root of 849343978 is about 29143.5066181131. The cubic root of 849343978 is about 947.0244768945.

The spelling of 849343978 in words is "eight hundred forty-nine million, three hundred forty-three thousand, nine hundred seventy-eight".