55861584 has 20 divisors (see below), whose sum is σ = 144309216. Its totient is φ = 18620512.

The previous prime is 55861583. The next prime is 55861591. The reversal of 55861584 is 48516855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55861583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581844 + ... + 581939.

Almost surely, 2^55861584 is an apocalyptic number.

It is an amenable number.

55861584 is an abundant number, since it is smaller than the sum of its proper divisors (88447632).

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

55861584 is a wasteful number, since it uses less digits than its factorization.

55861584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163794 (or 1163788 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 55861584 is about 7474.0607436654. The cubic root of 55861584 is about 382.2707618683.

The spelling of 55861584 in words is "fifty-five million, eight hundred sixty-one thousand, five hundred eighty-four".