1268439012 has 72 divisors (see below), whose sum is σ = 3405161760. Its totient is φ = 396990720.

The previous prime is 1268438957. The next prime is 1268439013. The reversal of 1268439012 is 2109348621.

1268439012 is a `hidden beast` number, since 1 + 268 + 4 + 390 + 1 + 2 = 666.

It is a super-2 number, since 2×1268439012² = 3217875054327072288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1268439013) 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, 69087 + ... + 85497.

Almost surely, 2^1268439012 is an apocalyptic number.

1268439012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268439012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702580880).

1268439012 is an abundant number, since it is smaller than the sum of its proper divisors (2136722748).

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

1268439012 is a wasteful number, since it uses less digits than its factorization.

1268439012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16553 (or 16548 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1268439012 is about 35615.1514386785. The cubic root of 1268439012 is about 1082.4882648199.

The spelling of 1268439012 in words is "one billion, two hundred sixty-eight million, four hundred thirty-nine thousand, twelve".