40388837 has 2 divisors, whose sum is σ = 40388838. Its totient is φ = 40388836.

The previous prime is 40388827. The next prime is 40388857. The reversal of 40388837 is 73888304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30846916 + 9541921 = 5554^2 + 3089^2 .

It is a cyclic number.

It is not a de Polignac number, because 40388837 - 2¹⁸ = 40126693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40388794 and 40388803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40388807) 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 as a sum of consecutive naturals, namely, 20194418 + 20194419.

It is an arithmetic number, because the mean of its divisors is an integer number (20194419).

Almost surely, 2^40388837 is an apocalyptic number.

It is an amenable number.

40388837 is a deficient number, since it is larger than the sum of its proper divisors (1).

40388837 is an equidigital number, since it uses as much as digits as its factorization.

40388837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 40388837 is about 6355.2212392646. The cubic root of 40388837 is about 343.0997876527.

The spelling of 40388837 in words is "forty million, three hundred eighty-eight thousand, eight hundred thirty-seven".