55239936 has 72 divisors (see below), whose sum is σ = 155703744. Its totient is φ = 17326080.

The previous prime is 55239929. The next prime is 55239967. The reversal of 55239936 is 63993255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10941 + ... + 15171.

It is an arithmetic number, because the mean of its divisors is an integer number (2162552).

Almost surely, 2^55239936 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 55239936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77851872).

55239936 is an abundant number, since it is smaller than the sum of its proper divisors (100463808).

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

55239936 is a wasteful number, since it uses less digits than its factorization.

55239936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267 (or 4253 counting only the distinct ones).

The product of its digits is 218700, while the sum is 42.

The square root of 55239936 is about 7432.3573649280. The cubic root of 55239936 is about 380.8474530700.

The spelling of 55239936 in words is "fifty-five million, two hundred thirty-nine thousand, nine hundred thirty-six".