4636440 has 128 divisors (see below), whose sum is σ = 15940800. Its totient is φ = 1213056.

The previous prime is 4636381. The next prime is 4636441. The reversal of 4636440 is 446364.

It is a happy number.

4636440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4636441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87454 + ... + 87506.

Almost surely, 2^4636440 is an apocalyptic number.

4636440 is a gapful number since it is divisible by the number (40) 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 4636440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7970400).

4636440 is an abundant number, since it is smaller than the sum of its proper divisors (11304360).

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

4636440 is an equidigital number, since it uses as much as digits as its factorization.

4636440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 4636440 is about 2153.2394200367. The cubic root of 4636440 is about 166.7483510705.

It can be divided in two parts, 463 and 6440, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 4636440 in words is "four million, six hundred thirty-six thousand, four hundred forty".