11890900008 has 64 divisors (see below), whose sum is σ = 35571076800. Its totient is φ = 3658737600.

The previous prime is 11890900001. The next prime is 11890900009. The reversal of 11890900008 is 80000909811.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11890900001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2114518 + ... + 2120133.

It is an arithmetic number, because the mean of its divisors is an integer number (555798075).

Almost surely, 2^11890900008 is an apocalyptic number.

11890900008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11890900008 is an abundant number, since it is smaller than the sum of its proper divisors (23680176792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11890900008 is a wasteful number, since it uses less digits than its factorization.

11890900008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234679 (or 4234669 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 11890900008 in words is "eleven billion, eight hundred ninety million, nine hundred thousand, eight".