2439090 has 48 divisors (see below), whose sum is σ = 6506136. Its totient is φ = 633600.

The previous prime is 2439083. The next prime is 2439091. The reversal of 2439090 is 909342.

It can be written as a sum of positive squares in 4 ways, for example, as 1687401 + 751689 = 1299^2 + 867^2 .

It is not an unprimeable number, because it can be changed into a prime (2439091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3360 + ... + 4020.

2^2439090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2439090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3253068).

2439090 is an abundant number, since it is smaller than the sum of its proper divisors (4067046).

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

2439090 is a wasteful number, since it uses less digits than its factorization.

2439090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2439090 is about 1561.7586241158. The cubic root of 2439090 is about 134.6095715334.

The spelling of 2439090 in words is "two million, four hundred thirty-nine thousand, ninety".