3139816 has 8 divisors (see below), whose sum is σ = 5887170. Its totient is φ = 1569904.

The previous prime is 3139813. The next prime is 3139837. The reversal of 3139816 is 6189313.

It can be written as a sum of positive squares in only one way, i.e., 2722500 + 417316 = 1650^2 + 646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3139811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196231 + ... + 196246.

Almost surely, 2^3139816 is an apocalyptic number.

It is an amenable number.

3139816 is a deficient number, since it is larger than the sum of its proper divisors (2747354).

3139816 is a wasteful number, since it uses less digits than its factorization.

3139816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392483 (or 392479 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 3139816 is about 1771.9525953027. The cubic root of 3139816 is about 146.4315747040.

The spelling of 3139816 in words is "three million, one hundred thirty-nine thousand, eight hundred sixteen".