123488644 has 12 divisors (see below), whose sum is σ = 219648268. Its totient is φ = 60732000.

The previous prime is 123488639. The next prime is 123488683. The reversal of 123488644 is 446884321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 119028100 = 2112^2 + 10910^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123488597 and 123488606.

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, 252807 + ... + 253294.

Almost surely, 2^123488644 is an apocalyptic number.

It is an amenable number.

123488644 is a deficient number, since it is larger than the sum of its proper divisors (96159624).

123488644 is a wasteful number, since it uses less digits than its factorization.

123488644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506166 (or 506164 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 123488644 is about 11112.5444431057. The cubic root of 123488644 is about 497.9766820800.

The spelling of 123488644 in words is "one hundred twenty-three million, four hundred eighty-eight thousand, six hundred forty-four".