38440913 has 4 divisors (see below), whose sum is σ = 43932480. Its totient is φ = 32949348.

The previous prime is 38440879. The next prime is 38440937. The reversal of 38440913 is 31904483.

38440913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38440913 - 2⁶ = 38440849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38440913.

It is not an unprimeable number, because it can be changed into a prime (38440993) 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 in 3 ways as a sum of consecutive naturals, for example, 2745773 + ... + 2745786.

It is an arithmetic number, because the mean of its divisors is an integer number (10983120).

Almost surely, 2^38440913 is an apocalyptic number.

It is an amenable number.

38440913 is a deficient number, since it is larger than the sum of its proper divisors (5491567).

38440913 is an equidigital number, since it uses as much as digits as its factorization.

38440913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491566.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 38440913 is about 6200.0736285951. The cubic root of 38440913 is about 337.4928408175.

The spelling of 38440913 in words is "thirty-eight million, four hundred forty thousand, nine hundred thirteen".