123909632 has 120 divisors (see below), whose sum is σ = 314879400. Its totient is φ = 48168960.

The previous prime is 123909623. The next prime is 123909641. The reversal of 123909632 is 236909321.

It is an interprime number because it is at equal distance from previous prime (123909623) and next prime (123909641).

It is a junction number, because it is equal to n+sod(n) for n = 123909592 and 123909601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275744 + ... + 276192.

It is an arithmetic number, because the mean of its divisors is an integer number (2623995).

Almost surely, 2^123909632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123909632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157439700).

123909632 is an abundant number, since it is smaller than the sum of its proper divisors (190969768).

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

123909632 is an equidigital number, since it uses as much as digits as its factorization.

123909632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 123909632 is about 11131.4703431308. The cubic root of 123909632 is about 498.5419281863.

It can be divided in two parts, 12390 and 9632, that added together give a palindrome (22022).

The spelling of 123909632 in words is "one hundred twenty-three million, nine hundred nine thousand, six hundred thirty-two".