3138940 has 36 divisors (see below), whose sum is σ = 7670376. Its totient is φ = 1075872.

The previous prime is 3138929. The next prime is 3138943. The reversal of 3138940 is 498313.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3138899 and 3138908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138943) 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, 622 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (213066).

Almost surely, 2^3138940 is an apocalyptic number.

It is an amenable number.

3138940 is an abundant number, since it is smaller than the sum of its proper divisors (4531436).

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

3138940 is a wasteful number, since it uses less digits than its factorization.

3138940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3138940 is about 1771.7053931170. The cubic root of 3138940 is about 146.4179554356.

The spelling of 3138940 in words is "three million, one hundred thirty-eight thousand, nine hundred forty".