1338187536 has 120 divisors (see below), whose sum is σ = 4321965440. Its totient is φ = 378597888.

The previous prime is 1338187511. The next prime is 1338187553. The reversal of 1338187536 is 6357818331.

1338187536 is a `hidden beast` number, since 1 + 3 + 38 + 1 + 87 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1338187491 and 1338187500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97380 + ... + 110268.

Almost surely, 2^1338187536 is an apocalyptic number.

1338187536 is a gapful number since it is divisible by the number (16) 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 1338187536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2160982720).

1338187536 is an abundant number, since it is smaller than the sum of its proper divisors (2983777904).

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

1338187536 is a wasteful number, since it uses less digits than its factorization.

1338187536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13013 (or 13004 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1338187536 is about 36581.2456868270. The cubic root of 1338187536 is about 1101.9764839850.

The spelling of 1338187536 in words is "one billion, three hundred thirty-eight million, one hundred eighty-seven thousand, five hundred thirty-six".