123820444 has 24 divisors (see below), whose sum is σ = 236703600. Its totient is φ = 56206080.

The previous prime is 123820439. The next prime is 123820447. The reversal of 123820444 is 444028321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123820447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43002 + ... + 45790.

It is an arithmetic number, because the mean of its divisors is an integer number (9862650).

Almost surely, 2^123820444 is an apocalyptic number.

It is an amenable number.

123820444 is a deficient number, since it is larger than the sum of its proper divisors (112883156).

123820444 is a wasteful number, since it uses less digits than its factorization.

123820444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813 (or 3811 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 123820444 is about 11127.4635025238. The cubic root of 123820444 is about 498.4222855371.

Adding to 123820444 its reverse (444028321), we get a palindrome (567848765).

The spelling of 123820444 in words is "one hundred twenty-three million, eight hundred twenty thousand, four hundred forty-four".