123788644 has 12 divisors (see below), whose sum is σ = 247577344. Its totient is φ = 53052264.

The previous prime is 123788641. The next prime is 123788659. The reversal of 123788644 is 446887321.

123788644 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 123788644.

It is not an unprimeable number, because it can be changed into a prime (123788641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210484 + ... + 2210539.

Almost surely, 2^123788644 is an apocalyptic number.

123788644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123788644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123788644 is a wasteful number, since it uses less digits than its factorization.

123788644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421034 (or 4421032 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 123788644 is about 11126.0345136980. The cubic root of 123788644 is about 498.3796130316.

The spelling of 123788644 in words is "one hundred twenty-three million, seven hundred eighty-eight thousand, six hundred forty-four".