55705248 has 72 divisors (see below), whose sum is σ = 159763968. Its totient is φ = 18410112.

The previous prime is 55705231. The next prime is 55705267. The reversal of 55705248 is 84250755.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35815 + ... + 37337.

It is an arithmetic number, because the mean of its divisors is an integer number (2218944).

Almost surely, 2^55705248 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 55705248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79881984).

55705248 is an abundant number, since it is smaller than the sum of its proper divisors (104058720).

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

55705248 is a wasteful number, since it uses less digits than its factorization.

55705248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55705248 is about 7463.5948443093. The cubic root of 55705248 is about 381.9138169840.

The spelling of 55705248 in words is "fifty-five million, seven hundred five thousand, two hundred forty-eight".