3138805 has 8 divisors (see below), whose sum is σ = 3796992. Its totient is φ = 2490768.

The previous prime is 3138803. The next prime is 3138809. The reversal of 3138805 is 5088313.

3138805 = T₁₁₁₈ + T₁₁₁₉ + ... + T₁₁₂₂.

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

It is a cyclic number.

It is not a de Polignac number, because 3138805 - 2¹ = 3138803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (474624).

Almost surely, 2^3138805 is an apocalyptic number.

It is an amenable number.

3138805 is a deficient number, since it is larger than the sum of its proper divisors (658187).

3138805 is a wasteful number, since it uses less digits than its factorization.

3138805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5075.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 3138805 is about 1771.6672938224. The cubic root of 3138805 is about 146.4158563504.

The spelling of 3138805 in words is "three million, one hundred thirty-eight thousand, eight hundred five".