55048840 has 128 divisors (see below), whose sum is σ = 157489920. Its totient is φ = 16819200.

The previous prime is 55048801. The next prime is 55048841. The reversal of 55048840 is 4884055.

It is a junction number, because it is equal to n+sod(n) for n = 55048796 and 55048805.

It is not an unprimeable number, because it can be changed into a prime (55048841) 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, 187734 + ... + 188026.

It is an arithmetic number, because the mean of its divisors is an integer number (1230390).

Almost surely, 2^55048840 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 55048840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78744960).

55048840 is an abundant number, since it is smaller than the sum of its proper divisors (102441080).

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

55048840 is a wasteful number, since it uses less digits than its factorization.

55048840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 55048840 is about 7419.4905485485. The cubic root of 55048840 is about 380.4077801655.

The spelling of 55048840 in words is "fifty-five million, forty-eight thousand, eight hundred forty".