11561738 has 8 divisors (see below), whose sum is σ = 17669988. Its totient is φ = 5671744.

The previous prime is 11561731. The next prime is 11561741. The reversal of 11561738 is 83716511.

It can be written as a sum of positive squares in 2 ways, for example, as 11404129 + 157609 = 3377^2 + 397^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11561731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54431 + ... + 54642.

Almost surely, 2^11561738 is an apocalyptic number.

11561738 is a deficient number, since it is larger than the sum of its proper divisors (6108250).

11561738 is a wasteful number, since it uses less digits than its factorization.

11561738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109128.

The product of its digits is 5040, while the sum is 32.

The square root of 11561738 is about 3400.2555786293. The cubic root of 11561738 is about 226.1210748645.

The spelling of 11561738 in words is "eleven million, five hundred sixty-one thousand, seven hundred thirty-eight".