72447275 has 12 divisors (see below), whose sum is σ = 89961504. Its totient is φ = 57876000.

The previous prime is 72447269. The next prime is 72447283. The reversal of 72447275 is 57274427.

It is not a de Polignac number, because 72447275 - 2⁴ = 72447259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21185 + ... + 24365.

It is an arithmetic number, because the mean of its divisors is an integer number (7496792).

Almost surely, 2^72447275 is an apocalyptic number.

72447275 is a deficient number, since it is larger than the sum of its proper divisors (17514229).

72447275 is a wasteful number, since it uses less digits than its factorization.

72447275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102 (or 4097 counting only the distinct ones).

The product of its digits is 109760, while the sum is 38.

The square root of 72447275 is about 8511.5965012446. The cubic root of 72447275 is about 416.8764401483.

The spelling of 72447275 in words is "seventy-two million, four hundred forty-seven thousand, two hundred seventy-five".