40124400 has 120 divisors (see below), whose sum is σ = 133079280. Its totient is φ = 10321920.

The previous prime is 40124389. The next prime is 40124401. The reversal of 40124400 is 442104.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40124400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40124401) 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, 34224 + ... + 35376.

It is an arithmetic number, because the mean of its divisors is an integer number (1108994).

Almost surely, 2^40124400 is an apocalyptic number.

40124400 is a gapful number since it is divisible by the number (40) 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 40124400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66539640).

40124400 is an abundant number, since it is smaller than the sum of its proper divisors (92954880).

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

40124400 is a wasteful number, since it uses less digits than its factorization.

40124400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40124400 is about 6334.3823692606. The cubic root of 40124400 is about 342.3493574474.

Adding to 40124400 its reverse (442104), we get a palindrome (40566504).

The spelling of 40124400 in words is "forty million, one hundred twenty-four thousand, four hundred".