780670 has 32 divisors (see below), whose sum is σ = 1575936. Its totient is φ = 276000.

The previous prime is 780667. The next prime is 780671. The reversal of 780670 is 76087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 5245.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2⁷⁸⁰⁶⁷⁰ is an apocalyptic number.

780670 is an abundant number, since it is smaller than the sum of its proper divisors (795266).

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

780670 is a wasteful number, since it uses less digits than its factorization.

780670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 780670 is about 883.5553180192. Note that the first 3 decimals coincide. The cubic root of 780670 is about 92.0779899486.

The spelling of 780670 in words is "seven hundred eighty thousand, six hundred seventy".