55487344 has 20 divisors (see below), whose sum is σ = 117280440. Its totient is φ = 25221440.

The previous prime is 55487297. The next prime is 55487347. The reversal of 55487344 is 44378455.

It is a junction number, because it is equal to n+sod(n) for n = 55487297 and 55487306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55487347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157459 + ... + 157810.

It is an arithmetic number, because the mean of its divisors is an integer number (5864022).

Almost surely, 2^55487344 is an apocalyptic number.

It is an amenable number.

55487344 is an abundant number, since it is smaller than the sum of its proper divisors (61793096).

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

55487344 is a wasteful number, since it uses less digits than its factorization.

55487344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315288 (or 315282 counting only the distinct ones).

The product of its digits is 268800, while the sum is 40.

The square root of 55487344 is about 7448.9827493424. The cubic root of 55487344 is about 381.4151847488.

Subtracting from 55487344 its reverse (44378455), we obtain a square (11108889 = 3333²).

The spelling of 55487344 in words is "fifty-five million, four hundred eighty-seven thousand, three hundred forty-four".