124005440 has 84 divisors (see below), whose sum is σ = 319889124. Its totient is φ = 45766656.

The previous prime is 124005407. The next prime is 124005449. The reversal of 124005440 is 44500421.

It can be written as a sum of positive squares in 6 ways, for example, as 36096064 + 87909376 = 6008^2 + 9376^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (124005449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52934 + ... + 55226.

Almost surely, 2^124005440 is an apocalyptic number.

124005440 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 124005440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159944562).

124005440 is an abundant number, since it is smaller than the sum of its proper divisors (195883684).

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

124005440 is a wasteful number, since it uses less digits than its factorization.

124005440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 124005440 is about 11135.7729861918. The cubic root of 124005440 is about 498.6703873947.

Adding to 124005440 its reverse (44500421), we get a palindrome (168505861).

The spelling of 124005440 in words is "one hundred twenty-four million, five thousand, four hundred forty".