849542978 has 8 divisors (see below), whose sum is σ = 1286224272. Its totient is φ = 420801556.

The previous prime is 849542971. The next prime is 849542999. The reversal of 849542978 is 879245948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (849542971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984700 + ... + 1985127.

It is an arithmetic number, because the mean of its divisors is an integer number (160778034).

Almost surely, 2^849542978 is an apocalyptic number.

849542978 is a deficient number, since it is larger than the sum of its proper divisors (436681294).

849542978 is a wasteful number, since it uses less digits than its factorization.

849542978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969936.

The product of its digits is 5806080, while the sum is 56.

The square root of 849542978 is about 29146.9205577536. The cubic root of 849542978 is about 947.0984332496.

The spelling of 849542978 in words is "eight hundred forty-nine million, five hundred forty-two thousand, nine hundred seventy-eight".