869498784 has 144 divisors (see below), whose sum is σ = 3082847040. Its totient is φ = 225838080.

The previous prime is 869498783. The next prime is 869498789. The reversal of 869498784 is 487894968.

869498784 is a `hidden beast` number, since 8 + 69 + 498 + 7 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869498783) 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, 2572 + ... + 41780.

It is an arithmetic number, because the mean of its divisors is an integer number (21408660).

Almost surely, 2^869498784 is an apocalyptic number.

869498784 is a gapful number since it is divisible by the number (84) 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 869498784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541423520).

869498784 is an abundant number, since it is smaller than the sum of its proper divisors (2213348256).

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

869498784 is a wasteful number, since it uses less digits than its factorization.

869498784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39243 (or 39232 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 869498784 is about 29487.2647765099. The cubic root of 869498784 is about 954.4569096742.

The spelling of 869498784 in words is "eight hundred sixty-nine million, four hundred ninety-eight thousand, seven hundred eighty-four".