869649308 has 12 divisors (see below), whose sum is σ = 1660239672. Its totient is φ = 395295120.

The previous prime is 869649307. The next prime is 869649311. The reversal of 869649308 is 803946968.

It is a self number, because there is not a number n which added to its sum of digits gives 869649308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869649307) 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, 9882335 + ... + 9882422.

It is an arithmetic number, because the mean of its divisors is an integer number (138353306).

Almost surely, 2^869649308 is an apocalyptic number.

It is an amenable number.

869649308 is a deficient number, since it is larger than the sum of its proper divisors (790590364).

869649308 is a wasteful number, since it uses less digits than its factorization.

869649308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19764772 (or 19764770 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 869649308 is about 29489.8170221519. The cubic root of 869649308 is about 954.5119836949.

The spelling of 869649308 in words is "eight hundred sixty-nine million, six hundred forty-nine thousand, three hundred eight".