2439660 has 48 divisors (see below), whose sum is σ = 6937056. Its totient is φ = 640512.

The previous prime is 2439649. The next prime is 2439667. The reversal of 2439660 is 669342.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2439667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4102 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (144522).

2^2439660 is an apocalyptic number.

2439660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2439660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3468528).

2439660 is an abundant number, since it is smaller than the sum of its proper divisors (4497396).

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

2439660 is a wasteful number, since it uses less digits than its factorization.

2439660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2439660 is about 1561.9411000419. The cubic root of 2439660 is about 134.6200565202.

The spelling of 2439660 in words is "two million, four hundred thirty-nine thousand, six hundred sixty".