8432728144 has 20 divisors (see below), whose sum is σ = 17299494324. Its totient is φ = 3968342528.

The previous prime is 8432728123. The next prime is 8432728153. The reversal of 8432728144 is 4418272348.

It can be written as a sum of positive squares in 2 ways, for example, as 5625000000 + 2807728144 = 75000^2 + 52988^2 .

It is a super-2 number, since 2×8432728144² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8432728144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15501067 + ... + 15501610.

Almost surely, 2^8432728144 is an apocalyptic number.

It is an amenable number.

8432728144 is an abundant number, since it is smaller than the sum of its proper divisors (8866766180).

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

8432728144 is a wasteful number, since it uses less digits than its factorization.

8432728144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31002702 (or 31002696 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 8432728144 is about 91829.8869867539. The cubic root of 8432728144 is about 2035.4293531101.

The spelling of 8432728144 in words is "eight billion, four hundred thirty-two million, seven hundred twenty-eight thousand, one hundred forty-four".