869806780 has 12 divisors (see below), whose sum is σ = 1826594280. Its totient is φ = 347922704.

The previous prime is 869806771. The next prime is 869806781. The reversal of 869806780 is 87608968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869806781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21745150 + ... + 21745189.

It is an arithmetic number, because the mean of its divisors is an integer number (152216190).

Almost surely, 2^869806780 is an apocalyptic number.

It is an amenable number.

869806780 is an abundant number, since it is smaller than the sum of its proper divisors (956787500).

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

869806780 is a wasteful number, since it uses less digits than its factorization.

869806780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43490348 (or 43490346 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 869806780 is about 29492.4868398716. The cubic root of 869806780 is about 954.5695930624.

The spelling of 869806780 in words is "eight hundred sixty-nine million, eight hundred six thousand, seven hundred eighty".