2800004 has 6 divisors (see below), whose sum is σ = 4900014. Its totient is φ = 1400000.

The previous prime is 2800003. The next prime is 2800033. The reversal of 2800004 is 4000082.

It can be written as a sum of positive squares in only one way, i.e., 2715904 + 84100 = 1648^2 + 290^2 .

It is not an unprimeable number, because it can be changed into a prime (2800001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349997 + ... + 350004.

It is an arithmetic number, because the mean of its divisors is an integer number (816669).

2^2800004 is an apocalyptic number.

It is an amenable number.

2800004 is a deficient number, since it is larger than the sum of its proper divisors (2100010).

2800004 is a wasteful number, since it uses less digits than its factorization.

2800004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700005 (or 700003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2800004 is about 1673.3212482963. The cubic root of 2800004 is about 140.9460417584.

Adding to 2800004 its reverse (4000082), we get a palindrome (6800086).

The spelling of 2800004 in words is "two million, eight hundred thousand, four".