11809398 has 8 divisors (see below), whose sum is σ = 23618808. Its totient is φ = 3936464.

The previous prime is 11809379. The next prime is 11809453. The reversal of 11809398 is 89390811.

It is a happy number.

11809398 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

11809398 is an admirable number.

It is a super-2 number, since 2×11809398² = 278923762244808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984111 + ... + 984122.

It is an arithmetic number, because the mean of its divisors is an integer number (2952351).

Almost surely, 2^11809398 is an apocalyptic number.

11809398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11809398 is a wasteful number, since it uses less digits than its factorization.

11809398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968238.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 11809398 is about 3436.4804669894. The cubic root of 11809398 is about 227.7242356978.

The spelling of 11809398 in words is "eleven million, eight hundred nine thousand, three hundred ninety-eight".