1189473140 has 24 divisors (see below), whose sum is σ = 2558819592. Its totient is φ = 464184320.

The previous prime is 1189473137. The next prime is 1189473167. The reversal of 1189473140 is 413749811.

It can be written as a sum of positive squares in 4 ways, for example, as 186104164 + 1003368976 = 13642^2 + 31676^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1189473094 and 1189473103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724469 + ... + 726108.

It is an arithmetic number, because the mean of its divisors is an integer number (106617483).

Almost surely, 2^1189473140 is an apocalyptic number.

1189473140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189473140 is an abundant number, since it is smaller than the sum of its proper divisors (1369346452).

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

1189473140 is a wasteful number, since it uses less digits than its factorization.

1189473140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450627 (or 1450625 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1189473140 is about 34488.7393216975. The cubic root of 1189473140 is about 1059.5420889123.

The spelling of 1189473140 in words is "one billion, one hundred eighty-nine million, four hundred seventy-three thousand, one hundred forty".