72143232 has 64 divisors (see below), whose sum is σ = 219014400. Its totient is φ = 20611584.

The previous prime is 72143219. The next prime is 72143233. The reversal of 72143232 is 23234127.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143233) 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, 10732 + ... + 16107.

It is an arithmetic number, because the mean of its divisors is an integer number (3422100).

Almost surely, 2^72143232 is an apocalyptic number.

It is an amenable number.

72143232 is an abundant number, since it is smaller than the sum of its proper divisors (146871168).

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

72143232 is a wasteful number, since it uses less digits than its factorization.

72143232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26863 (or 26851 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 72143232 is about 8493.7172074422. The cubic root of 72143232 is about 416.2924472219.

Adding to 72143232 its reverse (23234127), we get a palindrome (95377359).

The spelling of 72143232 in words is "seventy-two million, one hundred forty-three thousand, two hundred thirty-two".