869044212 has 18 divisors (see below), whose sum is σ = 2196750738. Its totient is φ = 289681392.

The previous prime is 869044201. The next prime is 869044289. The reversal of 869044212 is 212440968.

It can be written as a sum of positive squares in only one way, i.e., 824608656 + 44435556 = 28716^2 + 6666^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 24140117 = 869044212 / (8 + 6 + 9 + 0 + 4 + 4 + 2 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12070023 + ... + 12070094.

Almost surely, 2^869044212 is an apocalyptic number.

It is an amenable number.

869044212 is an abundant number, since it is smaller than the sum of its proper divisors (1327706526).

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

869044212 is a wasteful number, since it uses less digits than its factorization.

869044212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24140127 (or 24140122 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 869044212 is about 29479.5558311179. Note that the first 3 decimals coincide. The cubic root of 869044212 is about 954.2905513748.

The spelling of 869044212 in words is "eight hundred sixty-nine million, forty-four thousand, two hundred twelve".