1268641392 has 20 divisors (see below), whose sum is σ = 3277323720. Its totient is φ = 422880448.

The previous prime is 1268641373. The next prime is 1268641399. The reversal of 1268641392 is 2931468621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268641399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13214967 + ... + 13215062.

It is an arithmetic number, because the mean of its divisors is an integer number (163866186).

Almost surely, 2^1268641392 is an apocalyptic number.

1268641392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1268641392 is an abundant number, since it is smaller than the sum of its proper divisors (2008682328).

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

1268641392 is a wasteful number, since it uses less digits than its factorization.

1268641392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430040 (or 26430034 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1268641392 is about 35617.9925318651. The cubic root of 1268641392 is about 1082.5458322506.

The spelling of 1268641392 in words is "one billion, two hundred sixty-eight million, six hundred forty-one thousand, three hundred ninety-two".