1608138 has 24 divisors (see below), whose sum is σ = 3982368. Its totient is φ = 459432.

The previous prime is 1608133. The next prime is 1608197. The reversal of 1608138 is 8318061.

It is a super-2 number, since 2×1608138² = 5172215654088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1608133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6256 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (165932).

2^1608138 is an apocalyptic number.

1608138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1608138 is an abundant number, since it is smaller than the sum of its proper divisors (2374230).

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

1608138 is a wasteful number, since it uses less digits than its factorization.

1608138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12778 (or 12775 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1608138 is about 1268.1238109901. The cubic root of 1608138 is about 117.1586714153.

The spelling of 1608138 in words is "one million, six hundred eight thousand, one hundred thirty-eight".