55887840 has 192 divisors, whose sum is σ = 207385920. Its totient is φ = 14008320.

The previous prime is 55887803. The next prime is 55887859. The reversal of 55887840 is 4878855.

55887840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73060 + ... + 73820.

It is an arithmetic number, because the mean of its divisors is an integer number (1080135).

Almost surely, 2^55887840 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 55887840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103692960).

55887840 is an abundant number, since it is smaller than the sum of its proper divisors (151498080).

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

55887840 is a wasteful number, since it uses less digits than its factorization.

55887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 788 counting only the distinct ones).

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

The square root of 55887840 is about 7475.8170122068. The cubic root of 55887840 is about 382.3306439811.

The spelling of 55887840 in words is "fifty-five million, eight hundred eighty-seven thousand, eight hundred forty".