1189234440 has 64 divisors (see below), whose sum is σ = 3964118400. Its totient is φ = 317128896.

The previous prime is 1189234433. The next prime is 1189234447. The reversal of 1189234440 is 444329811.

It is a happy number.

1189234440 is a `hidden beast` number, since 1 + 189 + 2 + 34 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (1189234433) and next prime (1189234447).

It is a super-2 number, since 2×1189234440² = 2828557106564227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1189234395 and 1189234404.

It is not an unprimeable number, because it can be changed into a prime (1189234447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549492 + ... + 551651.

It is an arithmetic number, because the mean of its divisors is an integer number (61939350).

Almost surely, 2^1189234440 is an apocalyptic number.

1189234440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189234440 is an abundant number, since it is smaller than the sum of its proper divisors (2774883960).

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

1189234440 is a wasteful number, since it uses less digits than its factorization.

1189234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101163 (or 1101153 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1189234440 is about 34485.2785982657. The cubic root of 1189234440 is about 1059.4712088988.

The spelling of 1189234440 in words is "one billion, one hundred eighty-nine million, two hundred thirty-four thousand, four hundred forty".