55420008 has 64 divisors (see below), whose sum is σ = 159874560. Its totient is φ = 15681216.

The previous prime is 55419929. The next prime is 55420039. The reversal of 55420008 is 80002455.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55420008.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16435 + ... + 19517.

It is an arithmetic number, because the mean of its divisors is an integer number (2498040).

Almost surely, 2^55420008 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 55420008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79937280).

55420008 is an abundant number, since it is smaller than the sum of its proper divisors (104454552).

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

55420008 is a wasteful number, since it uses less digits than its factorization.

55420008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206 (or 3202 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 55420008 is about 7444.4615654861. The cubic root of 55420008 is about 381.2608350231.

The spelling of 55420008 in words is "fifty-five million, four hundred twenty thousand, eight".