138484665 has 24 divisors (see below), whose sum is σ = 261862848. Its totient is φ = 67143840.

The previous prime is 138484663. The next prime is 138484691. The reversal of 138484665 is 566484831.

It is not a de Polignac number, because 138484665 - 2¹ = 138484663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138484665.

It is not an unprimeable number, because it can be changed into a prime (138484663) 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, 139389 + ... + 140378.

It is an arithmetic number, because the mean of its divisors is an integer number (10910952).

Almost surely, 2^138484665 is an apocalyptic number.

138484665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138484665 is a deficient number, since it is larger than the sum of its proper divisors (123378183).

138484665 is a wasteful number, since it uses less digits than its factorization.

138484665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279789 (or 279786 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 138484665 is about 11767.9507561852. The cubic root of 138484665 is about 517.3691890893.

The spelling of 138484665 in words is "one hundred thirty-eight million, four hundred eighty-four thousand, six hundred sixty-five".