38445907 has 2 divisors, whose sum is σ = 38445908. Its totient is φ = 38445906.

The previous prime is 38445881. The next prime is 38445973. The reversal of 38445907 is 70954483.

It is a weak prime.

It is an emirp because it is prime and its reverse (70954483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38445907 - 2¹⁹ = 37921619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38445907.

It is not a weakly prime, because it can be changed into another prime (38445307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19222953 + 19222954.

It is an arithmetic number, because the mean of its divisors is an integer number (19222954).

Almost surely, 2^38445907 is an apocalyptic number.

38445907 is a deficient number, since it is larger than the sum of its proper divisors (1).

38445907 is an equidigital number, since it uses as much as digits as its factorization.

38445907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 38445907 is about 6200.4763526684. The cubic root of 38445907 is about 337.5074551623.

The spelling of 38445907 in words is "thirty-eight million, four hundred forty-five thousand, nine hundred seven".