55288872 has 128 divisors (see below), whose sum is σ = 165888000. Its totient is φ = 17012160.

The previous prime is 55288867. The next prime is 55288949. The reversal of 55288872 is 27888255.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 153829 + ... + 154187.

It is an arithmetic number, because the mean of its divisors is an integer number (1296000).

Almost surely, 2^55288872 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 55288872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82944000).

55288872 is an abundant number, since it is smaller than the sum of its proper divisors (110599128).

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

55288872 is a wasteful number, since it uses less digits than its factorization.

55288872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 418 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 55288872 is about 7435.6487275826. The cubic root of 55288872 is about 380.9598816956.

It can be divided in two parts, 5528 and 8872, that added together give a square (14400 = 120²).

The spelling of 55288872 in words is "fifty-five million, two hundred eighty-eight thousand, eight hundred seventy-two".