8544432420 has 60 divisors (see below), whose sum is σ = 26804206044. Its totient is φ = 2278514880.

The previous prime is 8544432419. The next prime is 8544432493. The reversal of 8544432420 is 242344458.

It can be written as a sum of positive squares in 2 ways, for example, as 1798438464 + 6745993956 = 42408^2 + 82134^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2635551 + ... + 2638790.

Almost surely, 2^8544432420 is an apocalyptic number.

It is an amenable number.

8544432420 is an abundant number, since it is smaller than the sum of its proper divisors (18259773624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8544432420 is a wasteful number, since it uses less digits than its factorization.

8544432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274362 (or 5274351 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

The square root of 8544432420 is about 92436.0991171739. The cubic root of 8544432420 is about 2044.3774082484.

Adding to 8544432420 its reverse (242344458), we get a palindrome (8786776878).

The spelling of 8544432420 in words is "eight billion, five hundred forty-four million, four hundred thirty-two thousand, four hundred twenty".