780045 has 64 divisors (see below), whose sum is σ = 1658880. Its totient is φ = 304128.

The previous prime is 780041. The next prime is 780047. The reversal of 780045 is 540087.

It is not a de Polignac number, because 780045 - 2² = 780041 is a prime.

780045 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 779997 and 780024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33904 + ... + 33926.

It is an arithmetic number, because the mean of its divisors is an integer number (25920).

2⁷⁸⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

780045 is an abundant number, since it is smaller than the sum of its proper divisors (878835).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

780045 is a wasteful number, since it uses less digits than its factorization.

780045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 780045 is about 883.2015624986. The cubic root of 780045 is about 92.0534110150.

The spelling of 780045 in words is "seven hundred eighty thousand, forty-five".