2205504 has 84 divisors (see below), whose sum is σ = 7237984. Its totient is φ = 628992.

The previous prime is 2205503. The next prime is 2205521. The reversal of 2205504 is 4055022.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3759 + ... + 4305.

2^2205504 is an apocalyptic number.

2205504 is a gapful number since it is divisible by the number (24) 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 2205504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3618992).

2205504 is an abundant number, since it is smaller than the sum of its proper divisors (5032480).

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

2205504 is a wasteful number, since it uses less digits than its factorization.

2205504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2205504 is about 1485.0939364229. The cubic root of 2205504 is about 130.1675158047.

The spelling of 2205504 in words is "two million, two hundred five thousand, five hundred four".