1228445872 has 40 divisors (see below), whose sum is σ = 2440732176. Its totient is φ = 598730496.

The previous prime is 1228445863. The next prime is 1228445873. The reversal of 1228445872 is 2785448221.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1228445873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128523 + ... + 137749.

Almost surely, 2^1228445872 is an apocalyptic number.

It is an amenable number.

1228445872 is a deficient number, since it is larger than the sum of its proper divisors (1212286304).

1228445872 is a wasteful number, since it uses less digits than its factorization.

1228445872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9445 (or 9439 counting only the distinct ones).

The product of its digits is 286720, while the sum is 43.

The square root of 1228445872 is about 35049.1921732870. The cubic root of 1228445872 is about 1070.9898174715.

The spelling of 1228445872 in words is "one billion, two hundred twenty-eight million, four hundred forty-five thousand, eight hundred seventy-two".