84642445 has 12 divisors (see below), whose sum is σ = 105199380. Its totient is φ = 65375744.

The previous prime is 84642433. The next prime is 84642463. The reversal of 84642445 is 54424648.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2812329 + 81830116 = 1677^2 + 9046^2 .

It is not a de Polignac number, because 84642445 - 2⁹ = 84641933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5860 + ... + 14269.

It is an arithmetic number, because the mean of its divisors is an integer number (8766615).

Almost surely, 2^84642445 is an apocalyptic number.

It is an amenable number.

84642445 is a deficient number, since it is larger than the sum of its proper divisors (20556935).

84642445 is a wasteful number, since it uses less digits than its factorization.

84642445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20192 (or 20163 counting only the distinct ones).

The product of its digits is 122880, while the sum is 37.

The square root of 84642445 is about 9200.1328794752. The cubic root of 84642445 is about 439.0655876186.

The spelling of 84642445 in words is "eighty-four million, six hundred forty-two thousand, four hundred forty-five".