2400804 has 54 divisors (see below), whose sum is σ = 7064694. Its totient is φ = 685440.

The previous prime is 2400793. The next prime is 2400817. The reversal of 2400804 is 4080042.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1695204 + 705600 = 1302^2 + 840^2 .

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

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1084 + ... + 2444.

2^2400804 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 2400804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3532347).

2400804 is an abundant number, since it is smaller than the sum of its proper divisors (4663890).

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

2400804 is a wasteful number, since it uses less digits than its factorization.

2400804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2400804 is about 1549.4528066385. The cubic root of 2400804 is about 133.9015390165.

Adding to 2400804 its reverse (4080042), we get a palindrome (6480846).

The spelling of 2400804 in words is "two million, four hundred thousand, eight hundred four".