55585728 has 168 divisors, whose sum is σ = 180051456. Its totient is φ = 16243200.

The previous prime is 55585661. The next prime is 55585757. The reversal of 55585728 is 82758555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196275 + ... + 196557.

Almost surely, 2^55585728 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 55585728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90025728).

55585728 is an abundant number, since it is smaller than the sum of its proper divisors (124465728).

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

55585728 is a wasteful number, since it uses less digits than its factorization.

55585728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 330 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The square root of 55585728 is about 7455.5836793641. The cubic root of 55585728 is about 381.6404793365.

The spelling of 55585728 in words is "fifty-five million, five hundred eighty-five thousand, seven hundred twenty-eight".