780465 has 16 divisors (see below), whose sum is σ = 1427328. Its totient is φ = 356736.

The previous prime is 780457. The next prime is 780469. The reversal of 780465 is 564087.

It is a happy number.

It is not a de Polignac number, because 780465 - 2³ = 780457 is a prime.

780465 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (780469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (89208).

2⁷⁸⁰⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

780465 is a deficient number, since it is larger than the sum of its proper divisors (646863).

780465 is a wasteful number, since it uses less digits than its factorization.

780465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 780465 is about 883.4393018199. The cubic root of 780465 is about 92.0699295046.

The spelling of 780465 in words is "seven hundred eighty thousand, four hundred sixty-five".