1387187298 has 48 divisors (see below), whose sum is σ = 3438017856. Its totient is φ = 395984160.

The previous prime is 1387187273. The next prime is 1387187299. The reversal of 1387187298 is 8927817831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1387187299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157368 + ... + 165948.

It is an arithmetic number, because the mean of its divisors is an integer number (71625372).

Almost surely, 2^1387187298 is an apocalyptic number.

1387187298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1387187298 is an abundant number, since it is smaller than the sum of its proper divisors (2050830558).

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

1387187298 is a wasteful number, since it uses less digits than its factorization.

1387187298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9879 (or 9876 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 1387187298 is about 37244.9633910412. The cubic root of 1387187298 is about 1115.2657568648.

The spelling of 1387187298 in words is "one billion, three hundred eighty-seven million, one hundred eighty-seven thousand, two hundred ninety-eight".