40024140 has 144 divisors (see below), whose sum is σ = 127464288. Its totient is φ = 9326592.

The previous prime is 40024133. The next prime is 40024151. The reversal of 40024140 is 4142004.

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

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 47 ways as a sum of consecutive naturals, for example, 412572 + ... + 412668.

Almost surely, 2^40024140 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 40024140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63732144).

40024140 is an abundant number, since it is smaller than the sum of its proper divisors (87440148).

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

40024140 is a wasteful number, since it uses less digits than its factorization.

40024140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 143 counting only the distinct ones).

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

The square root of 40024140 is about 6326.4634670565. The cubic root of 40024140 is about 342.0639735324.

Adding to 40024140 its reverse (4142004), we get a palindrome (44166144).

The spelling of 40024140 in words is "forty million, twenty-four thousand, one hundred forty".