3138740 has 36 divisors (see below), whose sum is σ = 7250628. Its totient is φ = 1140480.

The previous prime is 3138691. The next prime is 3138767. The reversal of 3138740 is 478313.

It can be written as a sum of positive squares in 2 ways, for example, as 2439844 + 698896 = 1562^2 + 836^2 .

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 1772 + ... + 3068.

Almost surely, 2^3138740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3625314).

3138740 is an abundant number, since it is smaller than the sum of its proper divisors (4111888).

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

3138740 is a wasteful number, since it uses less digits than its factorization.

3138740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 3138740 is about 1771.6489494254. The cubic root of 3138740 is about 146.4148456583.

The spelling of 3138740 in words is "three million, one hundred thirty-eight thousand, seven hundred forty".