55424020 has 48 divisors (see below), whose sum is σ = 123234048. Its totient is φ = 20894720.

The previous prime is 55424011. The next prime is 55424021. The reversal of 55424020 is 2042455.

It is a junction number, because it is equal to n+sod(n) for n = 55423982 and 55424000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55424021) 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, 31812 + ... + 33508.

It is an arithmetic number, because the mean of its divisors is an integer number (2567376).

Almost surely, 2^55424020 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 55424020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61617024).

55424020 is an abundant number, since it is smaller than the sum of its proper divisors (67810028).

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

55424020 is a wasteful number, since it uses less digits than its factorization.

55424020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 55424020 is about 7444.7310226764. The cubic root of 55424020 is about 381.2700349590.

Adding to 55424020 its reverse (2042455), we get a palindrome (57466475).

The spelling of 55424020 in words is "fifty-five million, four hundred twenty-four thousand, twenty".