1187905984 has 28 divisors (see below), whose sum is σ = 2362153264. Its totient is φ = 592717824.

The previous prime is 1187905981. The next prime is 1187905987. The reversal of 1187905984 is 4895097811.

It is an interprime number because it is at equal distance from previous prime (1187905981) and next prime (1187905987).

It is a super-2 number, since 2×1187905984² = 2822241253646016512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187905981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12112 + ... + 50224.

Almost surely, 2^1187905984 is an apocalyptic number.

It is an amenable number.

1187905984 is a deficient number, since it is larger than the sum of its proper divisors (1174247280).

1187905984 is an equidigital number, since it uses as much as digits as its factorization.

1187905984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38612 (or 38602 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 52.

The square root of 1187905984 is about 34466.0120118357. The cubic root of 1187905984 is about 1059.0765613735.

The spelling of 1187905984 in words is "one billion, one hundred eighty-seven million, nine hundred five thousand, nine hundred eighty-four".