1228488291 has 6 divisors (see below), whose sum is σ = 1774483100. Its totient is φ = 818992188.

The previous prime is 1228488269. The next prime is 1228488329. The reversal of 1228488291 is 1928848221.

1228488291 is a `hidden beast` number, since 1 + 2 + 284 + 88 + 291 = 666.

1228488291 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 1228488291 - 2²⁹ = 691617379 is a prime.

It is a super-2 number, since 2×1228488291² = 3018366962248201362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228488241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68249341 + ... + 68249358.

Almost surely, 2^1228488291 is an apocalyptic number.

1228488291 is a deficient number, since it is larger than the sum of its proper divisors (545994809).

1228488291 is a wasteful number, since it uses less digits than its factorization.

1228488291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136498705 (or 136498702 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1228488291 is about 35049.7973032655. The cubic root of 1228488291 is about 1071.0021446444.

The spelling of 1228488291 in words is "one billion, two hundred twenty-eight million, four hundred eighty-eight thousand, two hundred ninety-one".