38445913 has 8 divisors (see below), whose sum is σ = 42916896. Its totient is φ = 34137600.

The previous prime is 38445907. The next prime is 38445973. The reversal of 38445913 is 31954483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38445913 - 2⁵ = 38445881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38445973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40168 + ... + 41113.

It is an arithmetic number, because the mean of its divisors is an integer number (5364612).

Almost surely, 2^38445913 is an apocalyptic number.

It is an amenable number.

38445913 is a deficient number, since it is larger than the sum of its proper divisors (4470983).

38445913 is a wasteful number, since it uses less digits than its factorization.

38445913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81335.

The product of its digits is 51840, while the sum is 37.

The square root of 38445913 is about 6200.4768365022. The cubic root of 38445913 is about 337.5074727198.

The spelling of 38445913 in words is "thirty-eight million, four hundred forty-five thousand, nine hundred thirteen".