823993850 has 24 divisors (see below), whose sum is σ = 1536024828. Its totient is φ = 328867200.

The previous prime is 823993829. The next prime is 823993861. The reversal of 823993850 is 58399328.

It can be written as a sum of positive squares in 6 ways, for example, as 360582121 + 463411729 = 18989^2 + 21527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 823993795 and 823993804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4820 + ... + 40880.

Almost surely, 2^823993850 is an apocalyptic number.

823993850 is a deficient number, since it is larger than the sum of its proper divisors (712030978).

823993850 is a wasteful number, since it uses less digits than its factorization.

823993850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36530 (or 36525 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 823993850 is about 28705.2930659138. The cubic root of 823993850 is about 937.5072971284.

The spelling of 823993850 in words is "eight hundred twenty-three million, nine hundred ninety-three thousand, eight hundred fifty".