55842020 has 48 divisors (see below), whose sum is σ = 126841008. Its totient is φ = 20528640.

The previous prime is 55841983. The next prime is 55842029. The reversal of 55842020 is 2024855.

It can be written as a sum of positive squares in 8 ways, for example, as 2930944 + 52911076 = 1712^2 + 7274^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (55842029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102950 + ... + 103490.

It is an arithmetic number, because the mean of its divisors is an integer number (2642521).

Almost surely, 2^55842020 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 55842020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63420504).

55842020 is an abundant number, since it is smaller than the sum of its proper divisors (70998988).

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

55842020 is a wasteful number, since it uses less digits than its factorization.

55842020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 55842020 is about 7472.7518358366. The cubic root of 55842020 is about 382.2261300128.

Adding to 55842020 its reverse (2024855), we get a palindrome (57866875).

The spelling of 55842020 in words is "fifty-five million, eight hundred forty-two thousand, twenty".