780449 has 4 divisors (see below), whose sum is σ = 789936. Its totient is φ = 770964.

The previous prime is 780433. The next prime is 780457. The reversal of 780449 is 944087.

It is a happy number.

780449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 944087 = 71 ⋅13297.

It is a cyclic number.

It is not a de Polignac number, because 780449 - 2⁴ = 780433 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780469) 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, 4619 + ... + 4784.

It is an arithmetic number, because the mean of its divisors is an integer number (197484).

2⁷⁸⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

780449 is a deficient number, since it is larger than the sum of its proper divisors (9487).

780449 is an equidigital number, since it uses as much as digits as its factorization.

780449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 780449 is about 883.4302462560. The cubic root of 780449 is about 92.0693003374.

The spelling of 780449 in words is "seven hundred eighty thousand, four hundred forty-nine".