40036840 has 16 divisors (see below), whose sum is σ = 90082980. Its totient is φ = 16014720.

The previous prime is 40036837. The next prime is 40036861. The reversal of 40036840 is 4863004.

40036840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39917124 + 119716 = 6318^2 + 346^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500421 + ... + 500500.

Almost surely, 2^40036840 is an apocalyptic number.

40036840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40036840 is an abundant number, since it is smaller than the sum of its proper divisors (50046140).

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

40036840 is a wasteful number, since it uses less digits than its factorization.

40036840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000932 (or 1000928 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40036840 is about 6327.4671077770. The cubic root of 40036840 is about 342.1001496422.

Adding to 40036840 its reverse (4863004), we get a palindrome (44899844).

The spelling of 40036840 in words is "forty million, thirty-six thousand, eight hundred forty".