404020004 has 6 divisors (see below), whose sum is σ = 707035014. Its totient is φ = 202010000.

The previous prime is 404019991. The next prime is 404020021. The reversal of 404020004 is 400020404.

It can be written as a sum of positive squares in only one way, i.e., 403206400 + 813604 = 20080^2 + 902^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50502497 + ... + 50502504.

It is an arithmetic number, because the mean of its divisors is an integer number (117839169).

Almost surely, 2^404020004 is an apocalyptic number.

It is an amenable number.

404020004 is a deficient number, since it is larger than the sum of its proper divisors (303015010).

404020004 is a wasteful number, since it uses less digits than its factorization.

404020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101005005 (or 101005003 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 404020004 is about 20100.2488541809. The cubic root of 404020004 is about 739.2663803236.

Adding to 404020004 its reverse (400020404), we get a palindrome (804040408).

The spelling of 404020004 in words is "four hundred four million, twenty thousand, four".