1268491136 has 32 divisors (see below), whose sum is σ = 2756809080. Its totient is φ = 576586240.

The previous prime is 1268491127. The next prime is 1268491141. The reversal of 1268491136 is 6311948621.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1268491136² = 3218139524221140992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1268491093 and 1268491102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449051 + ... + 451866.

Almost surely, 2^1268491136 is an apocalyptic number.

1268491136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1268491136 is an abundant number, since it is smaller than the sum of its proper divisors (1488317944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268491136 is an equidigital number, since it uses as much as digits as its factorization.

1268491136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900942 (or 900930 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 1268491136 is about 35615.8831983709. The cubic root of 1268491136 is about 1082.5030921904.

The spelling of 1268491136 in words is "one billion, two hundred sixty-eight million, four hundred ninety-one thousand, one hundred thirty-six".