1187407144 has 64 divisors (see below), whose sum is σ = 2788007040. Its totient is φ = 460584960.

The previous prime is 1187407127. The next prime is 1187407153. The reversal of 1187407144 is 4417047811.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139392 + ... + 147664.

It is an arithmetic number, because the mean of its divisors is an integer number (43562610).

Almost surely, 2^1187407144 is an apocalyptic number.

1187407144 is a gapful number since it is divisible by the number (14) 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 1187407144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394003520).

1187407144 is an abundant number, since it is smaller than the sum of its proper divisors (1600599896).

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

1187407144 is a wasteful number, since it uses less digits than its factorization.

1187407144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8530 (or 8526 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 1187407144 is about 34458.7745574331. The cubic root of 1187407144 is about 1058.9282938260.

The spelling of 1187407144 in words is "one billion, one hundred eighty-seven million, four hundred seven thousand, one hundred forty-four".