1266091038 has 48 divisors (see below), whose sum is σ = 2801316960. Its totient is φ = 413183232.

The previous prime is 1266091037. The next prime is 1266091069. The reversal of 1266091038 is 8301906621.

1266091038 is a `hidden beast` number, since 1 + 2 + 6 + 609 + 10 + 38 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1266090993 and 1266091011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266091033) 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, 161170 + ... + 168842.

It is an arithmetic number, because the mean of its divisors is an integer number (58360770).

Almost surely, 2^1266091038 is an apocalyptic number.

1266091038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1266091038 is an abundant number, since it is smaller than the sum of its proper divisors (1535225922).

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

1266091038 is a wasteful number, since it uses less digits than its factorization.

1266091038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873 (or 7870 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1266091038 is about 35582.1730365080. The cubic root of 1266091038 is about 1081.8199304459.

Adding to 1266091038 its reverse (8301906621), we get a palindrome (9567997659).

The spelling of 1266091038 in words is "one billion, two hundred sixty-six million, ninety-one thousand, thirty-eight".