11681288 has 8 divisors (see below), whose sum is σ = 21902430. Its totient is φ = 5840640.

The previous prime is 11681273. The next prime is 11681291. The reversal of 11681288 is 88218611.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 1170724 = 3242^2 + 1082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730073 + ... + 730088.

Almost surely, 2^11681288 is an apocalyptic number.

It is an amenable number.

11681288 is a deficient number, since it is larger than the sum of its proper divisors (10221142).

11681288 is a wasteful number, since it uses less digits than its factorization.

11681288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460167 (or 1460163 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 11681288 is about 3417.7899291794. The cubic root of 11681288 is about 226.8977785010.

Adding to 11681288 its reverse (88218611), we get a palindrome (99899899).

The spelling of 11681288 in words is "eleven million, six hundred eighty-one thousand, two hundred eighty-eight".