84427144 has 8 divisors (see below), whose sum is σ = 158300910. Its totient is φ = 42213568.

The previous prime is 84427141. The next prime is 84427153. The reversal of 84427144 is 44172448.

It can be written as a sum of positive squares in only one way, i.e., 53846244 + 30580900 = 7338^2 + 5530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (84427141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5276689 + ... + 5276704.

Almost surely, 2^84427144 is an apocalyptic number.

It is an amenable number.

84427144 is a deficient number, since it is larger than the sum of its proper divisors (73873766).

84427144 is a wasteful number, since it uses less digits than its factorization.

84427144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553399 (or 10553395 counting only the distinct ones).

The product of its digits is 28672, while the sum is 34.

The square root of 84427144 is about 9188.4244568914. The cubic root of 84427144 is about 438.6929947069.

The spelling of 84427144 in words is "eighty-four million, four hundred twenty-seven thousand, one hundred forty-four".