1268804840 has 16 divisors (see below), whose sum is σ = 2854810980. Its totient is φ = 507521920.

The previous prime is 1268804837. The next prime is 1268804869. The reversal of 1268804840 is 484088621.

It can be written as a sum of positive squares in 2 ways, for example, as 1072300516 + 196504324 = 32746^2 + 14018^2 .

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, 15860021 + ... + 15860100.

Almost surely, 2^1268804840 is an apocalyptic number.

1268804840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268804840 is an abundant number, since it is smaller than the sum of its proper divisors (1586006140).

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

1268804840 is a wasteful number, since it uses less digits than its factorization.

1268804840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31720132 (or 31720128 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 41.

The square root of 1268804840 is about 35620.2869163066. The cubic root of 1268804840 is about 1082.5923209206.

The spelling of 1268804840 in words is "one billion, two hundred sixty-eight million, eight hundred four thousand, eight hundred forty".