1189545372 has 144 divisors (see below), whose sum is σ = 3299950080. Its totient is φ = 370367712.

The previous prime is 1189545347. The next prime is 1189545451. The reversal of 1189545372 is 2735459811.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2684983 + ... + 2685425.

It is an arithmetic number, because the mean of its divisors is an integer number (22916320).

Almost surely, 2^1189545372 is an apocalyptic number.

1189545372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189545372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649975040).

1189545372 is an abundant number, since it is smaller than the sum of its proper divisors (2110404708).

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

1189545372 is a wasteful number, since it uses less digits than its factorization.

1189545372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 518 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1189545372 is about 34489.7864881765. The cubic root of 1189545372 is about 1059.5635357452.

The spelling of 1189545372 in words is "one billion, one hundred eighty-nine million, five hundred forty-five thousand, three hundred seventy-two".