1268438493 has 16 divisors (see below), whose sum is σ = 2046556800. Its totient is φ = 682185216.

The previous prime is 1268438473. The next prime is 1268438503. The reversal of 1268438493 is 3948348621.

It is not a de Polignac number, because 1268438493 - 2⁶ = 1268438429 is a prime.

It is a super-2 number, since 2×1268438493² = 3217872421048222098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268438473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1776168 + ... + 1776881.

It is an arithmetic number, because the mean of its divisors is an integer number (127909800).

Almost surely, 2^1268438493 is an apocalyptic number.

It is an amenable number.

1268438493 is a deficient number, since it is larger than the sum of its proper divisors (778118307).

1268438493 is a wasteful number, since it uses less digits than its factorization.

1268438493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553076.

The product of its digits is 995328, while the sum is 48.

The square root of 1268438493 is about 35615.1441524529. The cubic root of 1268438493 is about 1082.4881171813.

The spelling of 1268438493 in words is "one billion, two hundred sixty-eight million, four hundred thirty-eight thousand, four hundred ninety-three".