1268423550 has 336 divisors, whose sum is σ = 3952113120. Its totient is φ = 301086720.

The previous prime is 1268423543. The next prime is 1268423557. The reversal of 1268423550 is 553248621.

1268423550 is a `hidden beast` number, since 1 + 2 + 6 + 84 + 23 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (1268423543) and next prime (1268423557).

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268423557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 14251906 + ... + 14251994.

Almost surely, 2^1268423550 is an apocalyptic number.

1268423550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268423550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976056560).

1268423550 is an abundant number, since it is smaller than the sum of its proper divisors (2683689570).

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

1268423550 is a wasteful number, since it uses less digits than its factorization.

1268423550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1268423550 is about 35614.9343674813. The cubic root of 1268423550 is about 1082.4838663686.

The spelling of 1268423550 in words is "one billion, two hundred sixty-eight million, four hundred twenty-three thousand, five hundred fifty".