780455 has 8 divisors (see below), whose sum is σ = 1008672. Its totient is φ = 576288.

The previous prime is 780433. The next prime is 780457. The reversal of 780455 is 554087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780455 - 2¹⁶ = 714919 is a prime.

It is a super-2 number, since 2×780455² = 1218220014050, 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 (780457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5939 + ... + 6068.

It is an arithmetic number, because the mean of its divisors is an integer number (126084).

2⁷⁸⁰⁴⁵⁵ is an apocalyptic number.

780455 is a deficient number, since it is larger than the sum of its proper divisors (228217).

780455 is a wasteful number, since it uses less digits than its factorization.

780455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12025.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 780455 is about 883.4336421034. The cubic root of 780455 is about 92.0695362761.

The spelling of 780455 in words is "seven hundred eighty thousand, four hundred fifty-five".