1268890258 has 16 divisors (see below), whose sum is σ = 1940400000. Its totient is φ = 622198512.

The previous prime is 1268890253. The next prime is 1268890277. The reversal of 1268890258 is 8520988621.

It is a super-2 number, since 2×1268890258² = 3220164973694613128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1268890253) 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, 3408 + ... + 50491.

It is an arithmetic number, because the mean of its divisors is an integer number (121275000).

Almost surely, 2^1268890258 is an apocalyptic number.

1268890258 is a deficient number, since it is larger than the sum of its proper divisors (671509742).

1268890258 is a wasteful number, since it uses less digits than its factorization.

1268890258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54129.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 1268890258 is about 35621.4859038755. The cubic root of 1268890258 is about 1082.6166143325.

The spelling of 1268890258 in words is "one billion, two hundred sixty-eight million, eight hundred ninety thousand, two hundred fifty-eight".