123643028 has 12 divisors (see below), whose sum is σ = 217809312. Its totient is φ = 61411800.

The previous prime is 123643007. The next prime is 123643043. The reversal of 123643028 is 820346321.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 101750 + ... + 102957.

It is an arithmetic number, because the mean of its divisors is an integer number (18150776).

Almost surely, 2^123643028 is an apocalyptic number.

It is an amenable number.

123643028 is a deficient number, since it is larger than the sum of its proper divisors (94166284).

123643028 is a wasteful number, since it uses less digits than its factorization.

123643028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204862 (or 204860 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 123643028 is about 11119.4886573079. The cubic root of 123643028 is about 498.1841171224.

Adding to 123643028 its reverse (820346321), we get a palindrome (943989349).

The spelling of 123643028 in words is "one hundred twenty-three million, six hundred forty-three thousand, twenty-eight".