823990374 has 32 divisors (see below), whose sum is σ = 1938803040. Its totient is φ = 258506496.

The previous prime is 823990367. The next prime is 823990397. The reversal of 823990374 is 473099328.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447879 + ... + 449714.

It is an arithmetic number, because the mean of its divisors is an integer number (60587595).

Almost surely, 2^823990374 is an apocalyptic number.

823990374 is an abundant number, since it is smaller than the sum of its proper divisors (1114812666).

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

823990374 is a wasteful number, since it uses less digits than its factorization.

823990374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897621 (or 897615 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 823990374 is about 28705.2325195251. The cubic root of 823990374 is about 937.5059788419.

The spelling of 823990374 in words is "eight hundred twenty-three million, nine hundred ninety thousand, three hundred seventy-four".