2804397641 has 4 divisors (see below), whose sum is σ = 2809780884. Its totient is φ = 2799014400.

The previous prime is 2804397623. The next prime is 2804397653. The reversal of 2804397641 is 1467934082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1467934082 = 2 ⋅733967041.

It can be written as a sum of positive squares in 2 ways, for example, as 1865894416 + 938503225 = 43196^2 + 30635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2804397641 - 2²⁶ = 2737288777 is a prime.

It is a super-2 number, since 2×2804397641² = 15729292257692729762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2804397592 and 2804397601.

It is not an unprimeable number, because it can be changed into a prime (2804397611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690840 + ... + 2691881.

It is an arithmetic number, because the mean of its divisors is an integer number (702445221).

Almost surely, 2^2804397641 is an apocalyptic number.

It is an amenable number.

2804397641 is a deficient number, since it is larger than the sum of its proper divisors (5383243).

2804397641 is an equidigital number, since it uses as much as digits as its factorization.

2804397641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383242.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 2804397641 is about 52956.5637197128. The cubic root of 2804397641 is about 1410.1972530571.

The spelling of 2804397641 in words is "two billion, eight hundred four million, three hundred ninety-seven thousand, six hundred forty-one".