869640148 has 24 divisors (see below), whose sum is σ = 1691809280. Its totient is φ = 388424160.

The previous prime is 869640131. The next prime is 869640169. The reversal of 869640148 is 841046968.

It is a junction number, because it is equal to n+sod(n) for n = 869640098 and 869640107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268128 + ... + 271351.

Almost surely, 2^869640148 is an apocalyptic number.

It is an amenable number.

869640148 is a deficient number, since it is larger than the sum of its proper divisors (822169132).

869640148 is a wasteful number, since it uses less digits than its factorization.

869640148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539527 (or 539525 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 869640148 is about 29489.6617138956. The cubic root of 869640148 is about 954.5086323975.

The spelling of 869640148 in words is "eight hundred sixty-nine million, six hundred forty thousand, one hundred forty-eight".