1338187865 has 8 divisors (see below), whose sum is σ = 1835229120. Its totient is φ = 917614512.

The previous prime is 1338187811. The next prime is 1338187883. The reversal of 1338187865 is 5687818331.

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

It is a cyclic number.

It is not a de Polignac number, because 1338187865 - 2²² = 1333993561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19116935 + ... + 19117004.

It is an arithmetic number, because the mean of its divisors is an integer number (229403640).

Almost surely, 2^1338187865 is an apocalyptic number.

It is an amenable number.

1338187865 is a deficient number, since it is larger than the sum of its proper divisors (497041255).

1338187865 is an equidigital number, since it uses as much as digits as its factorization.

1338187865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38233951.

The product of its digits is 967680, while the sum is 50.

The square root of 1338187865 is about 36581.2501836665. The cubic root of 1338187865 is about 1101.9765742937.

The spelling of 1338187865 in words is "one billion, three hundred thirty-eight million, one hundred eighty-seven thousand, eight hundred sixty-five".