55336440 has 64 divisors (see below), whose sum is σ = 167362560. Its totient is φ = 14636160.

The previous prime is 55336433. The next prime is 55336447. The reversal of 55336440 is 4463355.

It is an interprime number because it is at equal distance from previous prime (55336433) and next prime (55336447).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55336398 and 55336407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55336447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13425 + ... + 17055.

It is an arithmetic number, because the mean of its divisors is an integer number (2615040).

Almost surely, 2^55336440 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 55336440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83681280).

55336440 is an abundant number, since it is smaller than the sum of its proper divisors (112026120).

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

55336440 is a wasteful number, since it uses less digits than its factorization.

55336440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772 (or 3768 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 55336440 is about 7438.8466848027. The cubic root of 55336440 is about 381.0691038260.

Adding to 55336440 its reverse (4463355), we get a palindrome (59799795).

The spelling of 55336440 in words is "fifty-five million, three hundred thirty-six thousand, four hundred forty".