1809040004 has 12 divisors (see below), whose sum is σ = 3167869404. Its totient is φ = 903934464.

The previous prime is 1809039979. The next prime is 1809040031. The reversal of 1809040004 is 4000409081.

It can be written as a sum of positive squares in 2 ways, for example, as 761870404 + 1047169600 = 27602^2 + 32360^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139397 + ... + 151820.

It is an arithmetic number, because the mean of its divisors is an integer number (263989117).

Almost surely, 2^1809040004 is an apocalyptic number.

It is an amenable number.

1809040004 is a deficient number, since it is larger than the sum of its proper divisors (1358829400).

1809040004 is a wasteful number, since it uses less digits than its factorization.

1809040004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292774 (or 292772 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1809040004 is about 42532.8109111072. The cubic root of 1809040004 is about 1218.4734117242.

Adding to 1809040004 its reverse (4000409081), we get a palindrome (5809449085).

The spelling of 1809040004 in words is "one billion, eight hundred nine million, forty thousand, four".