123820408 has 16 divisors (see below), whose sum is σ = 242257680. Its totient is φ = 59218368.

The previous prime is 123820391. The next prime is 123820429. The reversal of 123820408 is 804028321.

It is a congruent number.

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, 336285 + ... + 336652.

It is an arithmetic number, because the mean of its divisors is an integer number (15141105).

Almost surely, 2^123820408 is an apocalyptic number.

It is an amenable number.

123820408 is a deficient number, since it is larger than the sum of its proper divisors (118437272).

123820408 is a wasteful number, since it uses less digits than its factorization.

123820408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672966 (or 672962 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 123820408 is about 11127.4618849044. The cubic root of 123820408 is about 498.4222372327.

Adding to 123820408 its reverse (804028321), we get a palindrome (927848729).

The spelling of 123820408 in words is "one hundred twenty-three million, eight hundred twenty thousand, four hundred eight".