1189409956 has 24 divisors (see below), whose sum is σ = 2504022080. Its totient is φ = 482918112.

The previous prime is 1189409939. The next prime is 1189409957. The reversal of 1189409956 is 6599049811.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1189409957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117335 + ... + 1118398.

Almost surely, 2^1189409956 is an apocalyptic number.

It is an amenable number.

1189409956 is an abundant number, since it is smaller than the sum of its proper divisors (1314612124).

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

1189409956 is a wasteful number, since it uses less digits than its factorization.

1189409956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235763 (or 2235761 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 1189409956 is about 34487.8233004056. The cubic root of 1189409956 is about 1059.5233278629.

The spelling of 1189409956 in words is "one billion, one hundred eighty-nine million, four hundred nine thousand, nine hundred fifty-six".