869633690 has 16 divisors (see below), whose sum is σ = 1591003080. Its totient is φ = 342150720.

The previous prime is 869633689. The next prime is 869633693. The reversal of 869633690 is 96336968.

It can be written as a sum of positive squares in 4 ways, for example, as 195244729 + 674388961 = 13973^2 + 25969^2 .

It is a super-2 number, since 2×869633690² = 1512525509566032200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (869633693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712205 + ... + 713424.

Almost surely, 2^869633690 is an apocalyptic number.

869633690 is a deficient number, since it is larger than the sum of its proper divisors (721369390).

869633690 is a wasteful number, since it uses less digits than its factorization.

869633690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425697.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 869633690 is about 29489.5522176923. The cubic root of 869633690 is about 954.5062696455.

The spelling of 869633690 in words is "eight hundred sixty-nine million, six hundred thirty-three thousand, six hundred ninety".