55449856 has 144 divisors (see below), whose sum is σ = 144224640. Its totient is φ = 20643840.

The previous prime is 55449853. The next prime is 55449857. The reversal of 55449856 is 65894455.

Its product of digits (864000) is a multiple of the sum of its prime factors (160).

It is not an unprimeable number, because it can be changed into a prime (55449853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571600 + ... + 571696.

It is an arithmetic number, because the mean of its divisors is an integer number (1001560).

Almost surely, 2^55449856 is an apocalyptic number.

55449856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55449856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72112320).

55449856 is an abundant number, since it is smaller than the sum of its proper divisors (88774784).

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

55449856 is a wasteful number, since it uses less digits than its factorization.

55449856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 146 counting only the distinct ones).

The product of its digits is 864000, while the sum is 46.

The square root of 55449856 is about 7446.4660074427. The cubic root of 55449856 is about 381.3292689783.

It can be divided in two parts, 5544 and 9856, that multiplied together give a square (54641664 = 7392²).

The spelling of 55449856 in words is "fifty-five million, four hundred forty-nine thousand, eight hundred fifty-six".