123752440 has 96 divisors (see below), whose sum is σ = 327581280. Its totient is φ = 41948928.

The previous prime is 123752429. The next prime is 123752449. The reversal of 123752440 is 44257321.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 123752399 and 123752408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123752449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201574 + ... + 202186.

It is an arithmetic number, because the mean of its divisors is an integer number (3412305).

Almost surely, 2^123752440 is an apocalyptic number.

123752440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123752440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163790640).

123752440 is an abundant number, since it is smaller than the sum of its proper divisors (203828840).

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

123752440 is a wasteful number, since it uses less digits than its factorization.

123752440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 123752440 is about 11124.4073999472. The cubic root of 123752440 is about 498.3310218894.

The spelling of 123752440 in words is "one hundred twenty-three million, seven hundred fifty-two thousand, four hundred forty".