55089684 has 72 divisors (see below), whose sum is σ = 152864712. Its totient is φ = 16623360.

The previous prime is 55089677. The next prime is 55089689. The reversal of 55089684 is 48698055.

55089684 is a `hidden beast` number, since 550 + 8 + 96 + 8 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8468100 + 46621584 = 2910^2 + 6828^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55089689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23694 + ... + 25914.

It is an arithmetic number, because the mean of its divisors is an integer number (2123121).

Almost surely, 2^55089684 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 55089684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76432356).

55089684 is an abundant number, since it is smaller than the sum of its proper divisors (97775028).

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

55089684 is a wasteful number, since it uses less digits than its factorization.

55089684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2292 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 55089684 is about 7422.2425182690. The cubic root of 55089684 is about 380.5018392728.

The spelling of 55089684 in words is "fifty-five million, eighty-nine thousand, six hundred eighty-four".