1842138 has 24 divisors (see below), whose sum is σ = 4130100. Its totient is φ = 592704.

The previous prime is 1842133. The next prime is 1842151. The reversal of 1842138 is 8312481.

It can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 91809 = 1323^2 + 303^2 .

It is a super-2 number, since 2×1842138² = 6786944822088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1842131) 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, 1243 + ... + 2286.

2^1842138 is an apocalyptic number.

1842138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1842138 is an abundant number, since it is smaller than the sum of its proper divisors (2287962).

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

1842138 is a wasteful number, since it uses less digits than its factorization.

1842138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3563 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1842138 is about 1357.2538450857. The cubic root of 1842138 is about 122.5859566087.

The spelling of 1842138 in words is "one million, eight hundred forty-two thousand, one hundred thirty-eight".