2278809461 has 4 divisors (see below), whose sum is σ = 2287218624. Its totient is φ = 2270400300.

The previous prime is 2278809437. The next prime is 2278809469. The reversal of 2278809461 is 1649088722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2278809461 - 2³⁰ = 1205067637 is a prime.

It is a super-2 number, since 2×2278809461² = 10385945119086221042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278809469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204175 + ... + 4204716.

It is an arithmetic number, because the mean of its divisors is an integer number (571804656).

Almost surely, 2^2278809461 is an apocalyptic number.

It is an amenable number.

2278809461 is a deficient number, since it is larger than the sum of its proper divisors (8409163).

2278809461 is an equidigital number, since it uses as much as digits as its factorization.

2278809461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409162.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 2278809461 is about 47736.8773695976. The cubic root of 2278809461 is about 1315.9397468510.

The spelling of 2278809461 in words is "two billion, two hundred seventy-eight million, eight hundred nine thousand, four hundred sixty-one".