823497984 has 54 divisors (see below), whose sum is σ = 2374354346. Its totient is φ = 274498560.

The previous prime is 823497959. The next prime is 823497989. The reversal of 823497984 is 489794328.

It can be written as a sum of positive squares in only one way, i.e., 635040000 + 188457984 = 25200^2 + 13728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 823497984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823497989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176407 + ... + 181014.

Almost surely, 2^823497984 is an apocalyptic number.

It is an amenable number.

823497984 is an abundant number, since it is smaller than the sum of its proper divisors (1550856362).

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

823497984 is a wasteful number, since it uses less digits than its factorization.

823497984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357443 (or 357426 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 823497984 is about 28696.6545785393. The cubic root of 823497984 is about 937.3192005479.

The spelling of 823497984 in words is "eight hundred twenty-three million, four hundred ninety-seven thousand, nine hundred eighty-four".