1308138 has 32 divisors (see below), whose sum is σ = 2913792. Its totient is φ = 388800.

The previous prime is 1308137. The next prime is 1308157. The reversal of 1308138 is 8318031.

It is a super-2 number, since 2×1308138² = 3422450054088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1308137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2148 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (91056).

2^1308138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1308138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456896).

1308138 is an abundant number, since it is smaller than the sum of its proper divisors (1605654).

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

1308138 is a wasteful number, since it uses less digits than its factorization.

1308138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1308138 is about 1143.7386065006. The cubic root of 1308138 is about 109.3665520550.

The spelling of 1308138 in words is "one million, three hundred eight thousand, one hundred thirty-eight".