55287744 has 56 divisors (see below), whose sum is σ = 147328128. Its totient is φ = 18297600.

The previous prime is 55287737. The next prime is 55287761. The reversal of 55287744 is 44778255.

It is a junction number, because it is equal to n+sod(n) for n = 55287696 and 55287705.

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, 28039 + ... + 29945.

Almost surely, 2^55287744 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 55287744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73664064).

55287744 is an abundant number, since it is smaller than the sum of its proper divisors (92040384).

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

55287744 is a wasteful number, since it uses less digits than its factorization.

55287744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2063 counting only the distinct ones).

The product of its digits is 313600, while the sum is 42.

The square root of 55287744 is about 7435.5728763828. The cubic root of 55287744 is about 380.9572909050.

The spelling of 55287744 in words is "fifty-five million, two hundred eighty-seven thousand, seven hundred forty-four".