2421636 has 48 divisors (see below), whose sum is σ = 6537216. Its totient is φ = 683424.

The previous prime is 2421593. The next prime is 2421641. The reversal of 2421636 is 6361242.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10555 + ... + 10781.

It is an arithmetic number, because the mean of its divisors is an integer number (136192).

2^2421636 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 2421636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3268608).

2421636 is an abundant number, since it is smaller than the sum of its proper divisors (4115580).

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

2421636 is a wasteful number, since it uses less digits than its factorization.

2421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 2421636 is about 1556.1606600862. The cubic root of 2421636 is about 134.2877162391.

Adding to 2421636 its reverse (6361242), we get a palindrome (8782878).

The spelling of 2421636 in words is "two million, four hundred twenty-one thousand, six hundred thirty-six".