2439684 has 54 divisors (see below), whose sum is σ = 6694506. Its totient is φ = 748800.

The previous prime is 2439677. The next prime is 2439719. The reversal of 2439684 is 4869342.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 278784 + 2160900 = 528^2 + 1470^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2²¹ + 4⁸ + 3 + 9⁴ + 6⁵ + 8³ + 4⁹ .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5884 + ... + 6284.

2^2439684 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 2439684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3347253).

2439684 is an abundant number, since it is smaller than the sum of its proper divisors (4254822).

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

2439684 is a wasteful number, since it uses less digits than its factorization.

2439684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 419 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2439684 is about 1561.9487827711. The cubic root of 2439684 is about 134.6204979575.

The spelling of 2439684 in words is "two million, four hundred thirty-nine thousand, six hundred eighty-four".