40408037 has 4 divisors (see below), whose sum is σ = 40465740. Its totient is φ = 40350336.

The previous prime is 40408021. The next prime is 40408057. The reversal of 40408037 is 73080404.

40408037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18887716 + 21520321 = 4346^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 40408037 - 2⁴ = 40408021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40407997 and 40408015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408007) by changing a digit.

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, 27788 + ... + 29205.

It is an arithmetic number, because the mean of its divisors is an integer number (10116435).

Almost surely, 2^40408037 is an apocalyptic number.

It is an amenable number.

40408037 is a deficient number, since it is larger than the sum of its proper divisors (57703).

40408037 is an equidigital number, since it uses as much as digits as its factorization.

40408037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57702.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40408037 is about 6356.7316287539. The cubic root of 40408037 is about 343.1541465039.

The spelling of 40408037 in words is "forty million, four hundred eight thousand, thirty-seven".