55186240 has 112 divisors (see below), whose sum is σ = 138988800. Its totient is φ = 20846592.

The previous prime is 55186189. The next prime is 55186247. The reversal of 55186240 is 4268155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55186247) 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, 698521 + ... + 698599.

Almost surely, 2^55186240 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 55186240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69494400).

55186240 is an abundant number, since it is smaller than the sum of its proper divisors (83802560).

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

55186240 is a wasteful number, since it uses less digits than its factorization.

55186240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 55186240 is about 7428.7441738157. The cubic root of 55186240 is about 380.7240120957.

The spelling of 55186240 in words is "fifty-five million, one hundred eighty-six thousand, two hundred forty".