11890023688 has 8 divisors (see below), whose sum is σ = 22293794430. Its totient is φ = 5945011840.

The previous prime is 11890023683. The next prime is 11890023689. The reversal of 11890023688 is 88632009811.

It can be written as a sum of positive squares in only one way, i.e., 10424818404 + 1465205284 = 102102^2 + 38278^2 .

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

It is a super-2 number, since 2×11890023688² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11890023683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743126473 + ... + 743126488.

Almost surely, 2^11890023688 is an apocalyptic number.

It is an amenable number.

11890023688 is a deficient number, since it is larger than the sum of its proper divisors (10403770742).

11890023688 is a wasteful number, since it uses less digits than its factorization.

11890023688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486252967 (or 1486252963 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 11890023688 in words is "eleven billion, eight hundred ninety million, twenty-three thousand, six hundred eighty-eight".