123243644 has 6 divisors (see below), whose sum is σ = 215676384. Its totient is φ = 61621820.

The previous prime is 123243613. The next prime is 123243667. The reversal of 123243644 is 446342321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15405452 + ... + 15405459.

It is an arithmetic number, because the mean of its divisors is an integer number (35946064).

Almost surely, 2^123243644 is an apocalyptic number.

It is an amenable number.

123243644 is a deficient number, since it is larger than the sum of its proper divisors (92432740).

123243644 is a wasteful number, since it uses less digits than its factorization.

123243644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30810915 (or 30810913 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 123243644 is about 11101.5153920535. The cubic root of 123243644 is about 497.6471374427.

Adding to 123243644 its reverse (446342321), we get a palindrome (569585965).

The spelling of 123243644 in words is "one hundred twenty-three million, two hundred forty-three thousand, six hundred forty-four".