123823820 has 48 divisors (see below), whose sum is σ = 264515328. Its totient is φ = 48684480.

The previous prime is 123823781. The next prime is 123823829. The reversal of 123823820 is 28328321.

It is not an unprimeable number, because it can be changed into a prime (123823829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437399 + ... + 437681.

It is an arithmetic number, because the mean of its divisors is an integer number (5510736).

Almost surely, 2^123823820 is an apocalyptic number.

123823820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123823820 is an abundant number, since it is smaller than the sum of its proper divisors (140691508).

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

123823820 is a wasteful number, since it uses less digits than its factorization.

123823820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 123823820 is about 11127.6151982354. The cubic root of 123823820 is about 498.4268153716.

The spelling of 123823820 in words is "one hundred twenty-three million, eight hundred twenty-three thousand, eight hundred twenty".