1268613378 has 48 divisors (see below), whose sum is σ = 2815637760. Its totient is φ = 412622208.

The previous prime is 1268613377. The next prime is 1268613383. The reversal of 1268613378 is 8733168621.

1268613378 is a `hidden beast` number, since 1 + 26 + 8 + 613 + 3 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1268613377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301626 + ... + 305802.

It is an arithmetic number, because the mean of its divisors is an integer number (58659120).

Almost surely, 2^1268613378 is an apocalyptic number.

1268613378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1268613378 is an abundant number, since it is smaller than the sum of its proper divisors (1547024382).

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

1268613378 is a wasteful number, since it uses less digits than its factorization.

1268613378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4588 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1268613378 is about 35617.5992733929. The cubic root of 1268613378 is about 1082.5378639726.

The spelling of 1268613378 in words is "one billion, two hundred sixty-eight million, six hundred thirteen thousand, three hundred seventy-eight".