2238138 has 64 divisors (see below), whose sum is σ = 5898240. Its totient is φ = 615600.

The previous prime is 2238127. The next prime is 2238161. The reversal of 2238138 is 8318322.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11623 + ... + 11813.

It is an arithmetic number, because the mean of its divisors is an integer number (92160).

2^2238138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2238138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2949120).

2238138 is an abundant number, since it is smaller than the sum of its proper divisors (3660102).

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

2238138 is a wasteful number, since it uses less digits than its factorization.

2238138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 234 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 2238138 is about 1496.0407748454. The cubic root of 2238138 is about 130.8063880392.

The spelling of 2238138 in words is "two million, two hundred thirty-eight thousand, one hundred thirty-eight".