72280232 has 8 divisors (see below), whose sum is σ = 135525450. Its totient is φ = 36140112.

The previous prime is 72280223. The next prime is 72280261. The reversal of 72280232 is 23208227.

It can be written as a sum of positive squares in only one way, i.e., 68989636 + 3290596 = 8306^2 + 1814^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4517507 + ... + 4517522.

Almost surely, 2^72280232 is an apocalyptic number.

It is an amenable number.

72280232 is a deficient number, since it is larger than the sum of its proper divisors (63245218).

72280232 is a wasteful number, since it uses less digits than its factorization.

72280232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035035 (or 9035031 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 72280232 is about 8501.7781669484. The cubic root of 72280232 is about 416.5557937176. Note that the first 3 decimals are identical.

Adding to 72280232 its reverse (23208227), we get a palindrome (95488459).

The spelling of 72280232 in words is "seventy-two million, two hundred eighty thousand, two hundred thirty-two".