1138908706 has 16 divisors (see below), whose sum is σ = 1903217400. Its totient is φ = 507523968.

The previous prime is 1138908689. The next prime is 1138908709. The reversal of 1138908706 is 6078098311.

It can be written as a sum of positive squares in 4 ways, for example, as 449058481 + 689850225 = 21191^2 + 26265^2 .

It is a super-2 number, since 2×1138908706² = 2594226081205188872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138908709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754491 + ... + 755998.

Almost surely, 2^1138908706 is an apocalyptic number.

1138908706 is a deficient number, since it is larger than the sum of its proper divisors (764308694).

1138908706 is a wasteful number, since it uses less digits than its factorization.

1138908706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510533.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1138908706 is about 33747.7214934579. The cubic root of 1138908706 is about 1044.3104830761.

The spelling of 1138908706 in words is "one billion, one hundred thirty-eight million, nine hundred eight thousand, seven hundred six".