3139720 has 32 divisors (see below), whose sum is σ = 7202520. Its totient is φ = 1231360.

The previous prime is 3139699. The next prime is 3139723. The reversal of 3139720 is 279313.

3139720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2696164 + 443556 = 1642^2 + 666^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3139723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380 + ... + 2860.

Almost surely, 2^3139720 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 3139720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3601260).

3139720 is an abundant number, since it is smaller than the sum of its proper divisors (4062800).

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

3139720 is a wasteful number, since it uses less digits than its factorization.

3139720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3139720 is about 1771.9255063348. The cubic root of 3139720 is about 146.4300823050.

The spelling of 3139720 in words is "three million, one hundred thirty-nine thousand, seven hundred twenty".