1187489938 has 8 divisors (see below), whose sum is σ = 1791186480. Its totient is φ = 590427780.

The previous prime is 1187489917. The next prime is 1187489939. The reversal of 1187489938 is 8399847811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1187489939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658148 + ... + 1658863.

It is an arithmetic number, because the mean of its divisors is an integer number (223898310).

Almost surely, 2^1187489938 is an apocalyptic number.

1187489938 is a deficient number, since it is larger than the sum of its proper divisors (603696542).

1187489938 is a wasteful number, since it uses less digits than its factorization.

1187489938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317192.

The product of its digits is 3483648, while the sum is 58.

The square root of 1187489938 is about 34459.9758850757. The cubic root of 1187489938 is about 1058.9529051179.

The spelling of 1187489938 in words is "one billion, one hundred eighty-seven million, four hundred eighty-nine thousand, nine hundred thirty-eight".