2281604 has 48 divisors (see below), whose sum is σ = 4762800.
Its totient is φ = 946176.
The previous prime is 2281579. The next prime is 2281607. The reversal of 2281604 is 4061822.
It can be written as a sum of positive squares in 8 ways, for example, as 91204 + 2190400 = 302^2 + 1480^2
It is a self number, because there is not a number n which added to its sum of digits gives 2281604.
It is not an unprimeable number, because it can be changed into a prime (2281607) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25592 + ... + 25680.
It is an arithmetic number, because the mean of its divisors is an integer number (99225).
22281604 is an apocalyptic number.
It is an amenable number.
2281604 is an abundant number, since it is smaller than the sum of its proper divisors (2481196).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2281604 is a wasteful number, since it uses less digits than its factorization.
2281604 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 152 (or 150 counting only the distinct ones).
The product of its (nonzero) digits is 768, while the sum is 23.
The square root of 2281604 is about 1510.4979311472.
The cubic root of 2281604 is about 131.6477446147.
The spelling of 2281604 in words is "two million, two hundred eighty-one thousand, six hundred four".