55307448 has 160 divisors (see below), whose sum is σ = 180338400. Its totient is φ = 15510528.

The previous prime is 55307389. The next prime is 55307471. The reversal of 55307448 is 84470355.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 403636 + ... + 403772.

It is an arithmetic number, because the mean of its divisors is an integer number (1127115).

Almost surely, 2^55307448 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 55307448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90169200).

55307448 is an abundant number, since it is smaller than the sum of its proper divisors (125030952).

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

55307448 is a wasteful number, since it uses less digits than its factorization.

55307448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 55307448 is about 7436.8977403216. The cubic root of 55307448 is about 381.0025419881.

It can be divided in two parts, 55307 and 448, that added together give a palindrome (55755).

The spelling of 55307448 in words is "fifty-five million, three hundred seven thousand, four hundred forty-eight".