84385978 has 8 divisors (see below), whose sum is σ = 127762272. Its totient is φ = 41798556.

The previous prime is 84385967. The next prime is 84385979. The reversal of 84385978 is 87958348.

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 (84385979) 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, 196950 + ... + 197377.

It is an arithmetic number, because the mean of its divisors is an integer number (15970284).

Almost surely, 2^84385978 is an apocalyptic number.

84385978 is a deficient number, since it is larger than the sum of its proper divisors (43376294).

84385978 is a wasteful number, since it uses less digits than its factorization.

84385978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394436.

The product of its digits is 1935360, while the sum is 52.

The square root of 84385978 is about 9186.1840826319. The cubic root of 84385978 is about 438.6216820502.

The spelling of 84385978 in words is "eighty-four million, three hundred eighty-five thousand, nine hundred seventy-eight".