40420037 has 4 divisors (see below), whose sum is σ = 46194336. Its totient is φ = 34645740.

The previous prime is 40420013. The next prime is 40420057. The reversal of 40420037 is 73002404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40420037 - 2⁸ = 40419781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2887139 + ... + 2887152.

It is an arithmetic number, because the mean of its divisors is an integer number (11548584).

Almost surely, 2^40420037 is an apocalyptic number.

It is an amenable number.

40420037 is a deficient number, since it is larger than the sum of its proper divisors (5774299).

40420037 is an equidigital number, since it uses as much as digits as its factorization.

40420037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774298.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 40420037 is about 6357.6754399702. The cubic root of 40420037 is about 343.1881120423.

The spelling of 40420037 in words is "forty million, four hundred twenty thousand, thirty-seven".