869497920 has 168 divisors, whose sum is σ = 3087502080. Its totient is φ = 224363520.

The previous prime is 869497903. The next prime is 869497921. The reversal of 869497920 is 29794968.

869497920 is a `hidden beast` number, since 8 + 69 + 497 + 92 + 0 = 666.

869497920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (869497921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84411 + ... + 94149.

Almost surely, 2^869497920 is an apocalyptic number.

869497920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543751040).

869497920 is an abundant number, since it is smaller than the sum of its proper divisors (2218004160).

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

869497920 is a wasteful number, since it uses less digits than its factorization.

869497920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9793 (or 9780 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 869497920 is about 29487.2501261138. The cubic root of 869497920 is about 954.4565935338.

The spelling of 869497920 in words is "eight hundred sixty-nine million, four hundred ninety-seven thousand, nine hundred twenty".