276640469 has 4 divisors (see below), whose sum is σ = 316160544. Its totient is φ = 237120396.

The previous prime is 276640459. The next prime is 276640477. The reversal of 276640469 is 964046672.

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 276640469 - 2²⁰ = 275591893 is a prime.

It is a super-2 number, since 2×276640469² = 153059898177079922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276640459) 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, 19760027 + ... + 19760040.

It is an arithmetic number, because the mean of its divisors is an integer number (79040136).

Almost surely, 2^276640469 is an apocalyptic number.

It is an amenable number.

276640469 is a deficient number, since it is larger than the sum of its proper divisors (39520075).

276640469 is an equidigital number, since it uses as much as digits as its factorization.

276640469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39520074.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 276640469 is about 16632.5124079316. The cubic root of 276640469 is about 651.5862394520.

The spelling of 276640469 in words is "two hundred seventy-six million, six hundred forty thousand, four hundred sixty-nine".