72227432 has 8 divisors (see below), whose sum is σ = 135426450. Its totient is φ = 36113712.

The previous prime is 72227413. The next prime is 72227443. The reversal of 72227432 is 23472227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 60435076 + 11792356 = 7774^2 + 3434^2 .

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 = 72227395 and 72227404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4514207 + ... + 4514222.

Almost surely, 2^72227432 is an apocalyptic number.

It is an amenable number.

72227432 is a deficient number, since it is larger than the sum of its proper divisors (63199018).

72227432 is a wasteful number, since it uses less digits than its factorization.

72227432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028435 (or 9028431 counting only the distinct ones).

The product of its digits is 9408, while the sum is 29.

The square root of 72227432 is about 8498.6723669053. The cubic root of 72227432 is about 416.4543390369.

Adding to 72227432 its reverse (23472227), we get a palindrome (95699659).

The spelling of 72227432 in words is "seventy-two million, two hundred twenty-seven thousand, four hundred thirty-two".