55239744 has 112 divisors (see below), whose sum is σ = 174394368. Its totient is φ = 15088128.

The previous prime is 55239697. The next prime is 55239761. The reversal of 55239744 is 44793255.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30019 + ... + 31805.

Almost surely, 2^55239744 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 55239744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87197184).

55239744 is an abundant number, since it is smaller than the sum of its proper divisors (119154624).

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

55239744 is a wasteful number, since it uses less digits than its factorization.

55239744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 1822 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

The square root of 55239744 is about 7432.3444484227. The cubic root of 55239744 is about 380.8470118265.

The spelling of 55239744 in words is "fifty-five million, two hundred thirty-nine thousand, seven hundred forty-four".