1268453889 has 12 divisors (see below), whose sum is σ = 1928643600. Its totient is φ = 801128664.

The previous prime is 1268453873. The next prime is 1268453909. The reversal of 1268453889 is 9883548621.

1268453889 is a `hidden beast` number, since 1 + 26 + 8 + 4 + 538 + 89 = 666.

It is not a de Polignac number, because 1268453889 - 2⁴ = 1268453873 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1268453489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3708759 + ... + 3709100.

It is an arithmetic number, because the mean of its divisors is an integer number (160720300).

Almost surely, 2^1268453889 is an apocalyptic number.

1268453889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1268453889 is a deficient number, since it is larger than the sum of its proper divisors (660189711).

1268453889 is a wasteful number, since it uses less digits than its factorization.

1268453889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7417884 (or 7417881 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 1268453889 is about 35615.3602958050. The cubic root of 1268453889 is about 1082.4924968234.

The spelling of 1268453889 in words is "one billion, two hundred sixty-eight million, four hundred fifty-three thousand, eight hundred eighty-nine".