780495 has 16 divisors (see below), whose sum is σ = 1270752. Its totient is φ = 408960.

The previous prime is 780469. The next prime is 780499. The reversal of 780495 is 594087.

It is not a de Polignac number, because 780495 - 2⁹ = 779983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (79422).

2⁷⁸⁰⁴⁹⁵ is an apocalyptic number.

780495 is a deficient number, since it is larger than the sum of its proper divisors (490257).

780495 is a wasteful number, since it uses less digits than its factorization.

780495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 780495 is about 883.4562807519. The cubic root of 780495 is about 92.0711091699.

It can be divided in two parts, 780 and 495, that added together give a triangular number (1275 = T₅₀).

The spelling of 780495 in words is "seven hundred eighty thousand, four hundred ninety-five".