1268308644 has 24 divisors (see below), whose sum is σ = 3039371328. Its totient is φ = 411343200.

The previous prime is 1268308609. The next prime is 1268308667. The reversal of 1268308644 is 4468038621.

It is a super-3 number, since 3×1268308644³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1268308596 and 1268308605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427832 + ... + 1428719.

It is an arithmetic number, because the mean of its divisors is an integer number (126640472).

Almost surely, 2^1268308644 is an apocalyptic number.

It is an amenable number.

1268308644 is an abundant number, since it is smaller than the sum of its proper divisors (1771062684).

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

1268308644 is a wasteful number, since it uses less digits than its factorization.

1268308644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856595 (or 2856593 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 1268308644 is about 35613.3211593639. The cubic root of 1268308644 is about 1082.4511781162.

The spelling of 1268308644 in words is "one billion, two hundred sixty-eight million, three hundred eight thousand, six hundred forty-four".