40124240 has 80 divisors (see below), whose sum is σ = 103024656. Its totient is φ = 14438400.

The previous prime is 40124237. The next prime is 40124263. The reversal of 40124240 is 4242104.

It can be written as a sum of positive squares in 8 ways, for example, as 8809024 + 31315216 = 2968^2 + 5596^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42170 + ... + 43110.

Almost surely, 2^40124240 is an apocalyptic number.

40124240 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 40124240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51512328).

40124240 is an abundant number, since it is smaller than the sum of its proper divisors (62900416).

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

40124240 is a wasteful number, since it uses less digits than its factorization.

40124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40124240 is about 6334.3697397610. The cubic root of 40124240 is about 342.3489023962.

Adding to 40124240 its reverse (4242104), we get a palindrome (44366344).

The spelling of 40124240 in words is "forty million, one hundred twenty-four thousand, two hundred forty".