823129028 has 12 divisors (see below), whose sum is σ = 1442884800. Its totient is φ = 410876232.

The previous prime is 823129009. The next prime is 823129031. The reversal of 823129028 is 820921328.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169376 + ... + 174167.

It is an arithmetic number, because the mean of its divisors is an integer number (120240400).

Almost surely, 2^823129028 is an apocalyptic number.

It is an amenable number.

823129028 is a deficient number, since it is larger than the sum of its proper divisors (619755772).

823129028 is a wasteful number, since it uses less digits than its factorization.

823129028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344146 (or 344144 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 823129028 is about 28690.2253040997. The cubic root of 823129028 is about 937.1791956701.

The spelling of 823129028 in words is "eight hundred twenty-three million, one hundred twenty-nine thousand, twenty-eight".