1189663420 has 24 divisors (see below), whose sum is σ = 2725411248. Its totient is φ = 432604800.

The previous prime is 1189663403. The next prime is 1189663427. The reversal of 1189663420 is 243669811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189663427) 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, 2703561 + ... + 2704000.

It is an arithmetic number, because the mean of its divisors is an integer number (113558802).

Almost surely, 2^1189663420 is an apocalyptic number.

1189663420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189663420 is an abundant number, since it is smaller than the sum of its proper divisors (1535747828).

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

1189663420 is a wasteful number, since it uses less digits than its factorization.

1189663420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407581 (or 5407579 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1189663420 is about 34491.4977929344. The cubic root of 1189663420 is about 1059.5985842104.

The spelling of 1189663420 in words is "one billion, one hundred eighty-nine million, six hundred sixty-three thousand, four hundred twenty".