40388507 has 2 divisors, whose sum is σ = 40388508. Its totient is φ = 40388506.

The previous prime is 40388489. The next prime is 40388519. The reversal of 40388507 is 70588304.

40388507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40388507 is a prime.

It is equal to p_2455919 and since 40388507 and 2455919 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40388707) 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 as a sum of consecutive naturals, namely, 20194253 + 20194254.

It is an arithmetic number, because the mean of its divisors is an integer number (20194254).

Almost surely, 2^40388507 is an apocalyptic number.

40388507 is a deficient number, since it is larger than the sum of its proper divisors (1).

40388507 is an equidigital number, since it uses as much as digits as its factorization.

40388507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 40388507 is about 6355.1952763074. The cubic root of 40388507 is about 343.0988532094.

The spelling of 40388507 in words is "forty million, three hundred eighty-eight thousand, five hundred seven".