40442420387 has 2 divisors, whose sum is σ = 40442420388. Its totient is φ = 40442420386.

The previous prime is 40442420353. The next prime is 40442420483. The reversal of 40442420387 is 78302424404.

40442420387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40442420387 - 2¹⁴ = 40442404003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40442420387.

It is not a weakly prime, because it can be changed into another prime (40442420327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20221210193 + 20221210194.

It is an arithmetic number, because the mean of its divisors is an integer number (20221210194).

Almost surely, 2^40442420387 is an apocalyptic number.

40442420387 is a deficient number, since it is larger than the sum of its proper divisors (1).

40442420387 is an equidigital number, since it uses as much as digits as its factorization.

40442420387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 38.

The spelling of 40442420387 in words is "forty billion, four hundred forty-two million, four hundred twenty thousand, three hundred eighty-seven".