2478636 has 36 divisors (see below), whose sum is σ = 6470464. Its totient is φ = 799200.

The previous prime is 2478631. The next prime is 2478643. The reversal of 2478636 is 6368742.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2478636² = 12287272840992, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2478636.

It is not an unprimeable number, because it can be changed into a prime (2478631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6 + ... + 2226.

2^2478636 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 2478636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3235232).

2478636 is an abundant number, since it is smaller than the sum of its proper divisors (3991828).

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

2478636 is a wasteful number, since it uses less digits than its factorization.

2478636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2257 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 2478636 is about 1574.3684448057. The cubic root of 2478636 is about 135.3331688599. Note that the first 3 decimals are identical.

The spelling of 2478636 in words is "two million, four hundred seventy-eight thousand, six hundred thirty-six".