55189000 has 64 divisors (see below), whose sum is σ = 130244400. Its totient is φ = 21888000.

The previous prime is 55188997. The next prime is 55189019. The reversal of 55189000 is 98155.

It can be written as a sum of positive squares in 8 ways, for example, as 16176484 + 39012516 = 4022^2 + 6246^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55189000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228880 + ... + 229120.

Almost surely, 2^55189000 is an apocalyptic number.

55189000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55189000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65122200).

55189000 is an abundant number, since it is smaller than the sum of its proper divisors (75055400).

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

55189000 is a wasteful number, since it uses less digits than its factorization.

55189000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 55189000 is about 7428.9299364040. The cubic root of 55189000 is about 380.7303589723.

The spelling of 55189000 in words is "fifty-five million, one hundred eighty-nine thousand".