1338565986 has 96 divisors (see below), whose sum is σ = 3093225408. Its totient is φ = 433667520.

The previous prime is 1338565973. The next prime is 1338565997. The reversal of 1338565986 is 6895658331.

1338565986 is a `hidden beast` number, since 13 + 38 + 5 + 6 + 598 + 6 = 666.

1338565986 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4043841 + ... + 4044171.

It is an arithmetic number, because the mean of its divisors is an integer number (32221098).

Almost surely, 2^1338565986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1338565986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546612704).

1338565986 is an abundant number, since it is smaller than the sum of its proper divisors (1754659422).

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

1338565986 is a wasteful number, since it uses less digits than its factorization.

1338565986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 546 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 1338565986 is about 36586.4180536986. The cubic root of 1338565986 is about 1102.0803567434.

The spelling of 1338565986 in words is "one billion, three hundred thirty-eight million, five hundred sixty-five thousand, nine hundred eighty-six".