1228890267 has 24 divisors (see below), whose sum is σ = 1960957440. Its totient is φ = 735349680.

The previous prime is 1228890263. The next prime is 1228890329. The reversal of 1228890267 is 7620988221.

1228890267 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1228890267 - 2² = 1228890263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228890263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70743 + ... + 86384.

It is an arithmetic number, because the mean of its divisors is an integer number (81706560).

Almost surely, 2^1228890267 is an apocalyptic number.

1228890267 is a deficient number, since it is larger than the sum of its proper divisors (732067173).

1228890267 is a wasteful number, since it uses less digits than its factorization.

1228890267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157223 (or 157220 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1228890267 is about 35055.5311898137. The cubic root of 1228890267 is about 1071.1189467914.

The spelling of 1228890267 in words is "one billion, two hundred twenty-eight million, eight hundred ninety thousand, two hundred sixty-seven".