1266790938 has 32 divisors (see below), whose sum is σ = 3065848704. Its totient is φ = 340649472.

The previous prime is 1266790937. The next prime is 1266790939. The reversal of 1266790938 is 8390976621.

It is an interprime number because it is at equal distance from previous prime (1266790937) and next prime (1266790939).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1266790937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886395 + ... + 887822.

It is an arithmetic number, because the mean of its divisors is an integer number (95807772).

Almost surely, 2^1266790938 is an apocalyptic number.

1266790938 is an abundant number, since it is smaller than the sum of its proper divisors (1799057766).

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

1266790938 is a wasteful number, since it uses less digits than its factorization.

1266790938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774246.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1266790938 is about 35592.0066587991. The cubic root of 1266790938 is about 1082.0192384651.

The spelling of 1266790938 in words is "one billion, two hundred sixty-six million, seven hundred ninety thousand, nine hundred thirty-eight".