72225388 has 6 divisors (see below), whose sum is σ = 126394436. Its totient is φ = 36112692.

The previous prime is 72225343. The next prime is 72225407. The reversal of 72225388 is 88352227.

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, 9028170 + ... + 9028177.

Almost surely, 2^72225388 is an apocalyptic number.

It is an amenable number.

72225388 is a deficient number, since it is larger than the sum of its proper divisors (54169048).

72225388 is a wasteful number, since it uses less digits than its factorization.

72225388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18056351 (or 18056349 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 72225388 is about 8498.5521119777. The cubic root of 72225388 is about 416.4504105171.

The spelling of 72225388 in words is "seventy-two million, two hundred twenty-five thousand, three hundred eighty-eight".