1138426605 has 24 divisors (see below), whose sum is σ = 2000309688. Its totient is φ = 598841856.

The previous prime is 1138426579. The next prime is 1138426613. The reversal of 1138426605 is 5066248311.

It is a happy number.

1138426605 is a `hidden beast` number, since 1 + 1 + 3 + 8 + 42 + 6 + 605 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 217061289 + 921365316 = 14733^2 + 30354^2 .

It is not a de Polignac number, because 1138426605 - 2¹¹ = 1138424557 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138426605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169992 + ... + 176561.

It is an arithmetic number, because the mean of its divisors is an integer number (83346237).

Almost surely, 2^1138426605 is an apocalyptic number.

1138426605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138426605 is a deficient number, since it is larger than the sum of its proper divisors (861883083).

1138426605 is a wasteful number, since it uses less digits than its factorization.

1138426605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346637 (or 346634 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1138426605 is about 33740.5780181668. The cubic root of 1138426605 is about 1044.1631097818.

The spelling of 1138426605 in words is "one billion, one hundred thirty-eight million, four hundred twenty-six thousand, six hundred five".