55489632 has 144 divisors (see below), whose sum is σ = 170127216. Its totient is φ = 15769600.

The previous prime is 55489627. The next prime is 55489669. The reversal of 55489632 is 23698455.

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, 197332 + ... + 197612.

It is an arithmetic number, because the mean of its divisors is an integer number (1181439).

Almost surely, 2^55489632 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 55489632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85063608).

55489632 is an abundant number, since it is smaller than the sum of its proper divisors (114637584).

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

55489632 is a wasteful number, since it uses less digits than its factorization.

55489632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 314 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 55489632 is about 7449.1363257763. The cubic root of 55489632 is about 381.4204271812.

The spelling of 55489632 in words is "fifty-five million, four hundred eighty-nine thousand, six hundred thirty-two".