1189944906 has 8 divisors (see below), whose sum is σ = 2379889824. Its totient is φ = 396648300.

The previous prime is 1189944893. The next prime is 1189944913. The reversal of 1189944906 is 6094499811.

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

1189944906 is an admirable 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, 99162070 + ... + 99162081.

It is an arithmetic number, because the mean of its divisors is an integer number (297486228).

Almost surely, 2^1189944906 is an apocalyptic number.

1189944906 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.

1189944906 is a wasteful number, since it uses less digits than its factorization.

1189944906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198324156.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1189944906 is about 34495.5780644418. The cubic root of 1189944906 is about 1059.6821480827.

The spelling of 1189944906 in words is "one billion, one hundred eighty-nine million, nine hundred forty-four thousand, nine hundred six".