3139840 has 72 divisors (see below), whose sum is σ = 8241408. Its totient is φ = 1136640.

The previous prime is 3139837. The next prime is 3139841. The reversal of 3139840 is 489313.

It is a junction number, because it is equal to n+sod(n) for n = 3139799 and 3139808.

It is not an unprimeable number, because it can be changed into a prime (3139841) 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, 13969 + ... + 14191.

It is an arithmetic number, because the mean of its divisors is an integer number (114464).

Almost surely, 2^3139840 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 3139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4120704).

3139840 is an abundant number, since it is smaller than the sum of its proper divisors (5101568).

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

3139840 is a wasteful number, since it uses less digits than its factorization.

3139840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 241 counting only the distinct ones).

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

The square root of 3139840 is about 1771.9593674800. The cubic root of 3139840 is about 146.4319477990.

It can be divided in two parts, 313 and 9840, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 3139840 in words is "three million, one hundred thirty-nine thousand, eight hundred forty".