84216478 has 16 divisors (see below), whose sum is σ = 133982496. Its totient is φ = 39615840.

The previous prime is 84216469. The next prime is 84216481. The reversal of 84216478 is 87461248.

It is a self number, because there is not a number n which added to its sum of digits gives 84216478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12201 + ... + 17812.

It is an arithmetic number, because the mean of its divisors is an integer number (8373906).

Almost surely, 2^84216478 is an apocalyptic number.

84216478 is a deficient number, since it is larger than the sum of its proper divisors (49766018).

84216478 is a wasteful number, since it uses less digits than its factorization.

84216478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30099.

The product of its digits is 86016, while the sum is 40.

The square root of 84216478 is about 9176.9536339681. The cubic root of 84216478 is about 438.3278093376.

The spelling of 84216478 in words is "eighty-four million, two hundred sixteen thousand, four hundred seventy-eight".