1228547289 has 8 divisors (see below), whose sum is σ = 1645827232. Its totient is φ = 815149440.

The previous prime is 1228547263. The next prime is 1228547291. The reversal of 1228547289 is 9827458221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228547289 - 2⁹ = 1228546777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228507289) 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, 969784 + ... + 971049.

It is an arithmetic number, because the mean of its divisors is an integer number (205728404).

Almost surely, 2^1228547289 is an apocalyptic number.

It is an amenable number.

1228547289 is a deficient number, since it is larger than the sum of its proper divisors (417279943).

1228547289 is a wasteful number, since it uses less digits than its factorization.

1228547289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941047.

The product of its digits is 645120, while the sum is 48.

The square root of 1228547289 is about 35050.6389242764. The cubic root of 1228547289 is about 1071.0192892857.

The spelling of 1228547289 in words is "one billion, two hundred twenty-eight million, five hundred forty-seven thousand, two hundred eighty-nine".