2305138 has 8 divisors (see below), whose sum is σ = 3772080. Its totient is φ = 1047780.

The previous prime is 2305133. The next prime is 2305153. The reversal of 2305138 is 8315032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2305138² = 10627322398088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 104779 = 2305138 / (2 + 3 + 0 + 5 + 1 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (2305133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52368 + ... + 52411.

It is an arithmetic number, because the mean of its divisors is an integer number (471510).

2^2305138 is an apocalyptic number.

2305138 is a deficient number, since it is larger than the sum of its proper divisors (1466942).

2305138 is a wasteful number, since it uses less digits than its factorization.

2305138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104792.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2305138 is about 1518.2680922683. The cubic root of 2305138 is about 132.0988317077.

The spelling of 2305138 in words is "two million, three hundred five thousand, one hundred thirty-eight".