84381445 has 8 divisors (see below), whose sum is σ = 104749560. Its totient is φ = 65177280.

The previous prime is 84381443. The next prime is 84381449. The reversal of 84381445 is 54418348.

84381445 is nontrivially palindromic in base 2.

It can be written as a sum of positive squares in 4 ways, for example, as 10042561 + 74338884 = 3169^2 + 8622^2 .

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

It is not a de Polignac number, because 84381445 - 2¹ = 84381443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84381443) 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, 290826 + ... + 291115.

It is an arithmetic number, because the mean of its divisors is an integer number (13093695).

Almost surely, 2^84381445 is an apocalyptic number.

It is an amenable number.

84381445 is a deficient number, since it is larger than the sum of its proper divisors (20368115).

84381445 is a wasteful number, since it uses less digits than its factorization.

84381445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581975.

The product of its digits is 61440, while the sum is 37.

The square root of 84381445 is about 9185.9373501021. The cubic root of 84381445 is about 438.6138280294.

The spelling of 84381445 in words is "eighty-four million, three hundred eighty-one thousand, four hundred forty-five".