72043432 has 8 divisors (see below), whose sum is σ = 135081450. Its totient is φ = 36021712.

The previous prime is 72043369. The next prime is 72043451. The reversal of 72043432 is 23434027.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 4901796 = 8194^2 + 2214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 72043397 and 72043406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4502707 + ... + 4502722.

Almost surely, 2^72043432 is an apocalyptic number.

It is an amenable number.

72043432 is a deficient number, since it is larger than the sum of its proper divisors (63038018).

72043432 is a wasteful number, since it uses less digits than its factorization.

72043432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9005435 (or 9005431 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 72043432 is about 8487.8402435484. The cubic root of 72043432 is about 416.1003979819.

Adding to 72043432 its reverse (23434027), we get a palindrome (95477459).

The spelling of 72043432 in words is "seventy-two million, forty-three thousand, four hundred thirty-two".