40204140 has 48 divisors (see below), whose sum is σ = 115196928. Its totient is φ = 10471104.

The previous prime is 40204139. The next prime is 40204141. The reversal of 40204140 is 4140204.

It is an interprime number because it is at equal distance from previous prime (40204139) and next prime (40204141).

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

It is not an unprimeable number, because it can be changed into a prime (40204141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5212 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (2399936).

Almost surely, 2^40204140 is an apocalyptic number.

It is an amenable number.

40204140 is an abundant number, since it is smaller than the sum of its proper divisors (74992788).

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

40204140 is a wasteful number, since it uses less digits than its factorization.

40204140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15638 (or 15636 counting only the distinct ones).

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

The square root of 40204140 is about 6340.6734658079. The cubic root of 40204140 is about 342.5759932251.

Adding to 40204140 its reverse (4140204), we get a palindrome (44344344).

The spelling of 40204140 in words is "forty million, two hundred four thousand, one hundred forty".