38949945 has 8 divisors (see below), whose sum is σ = 62319936. Its totient is φ = 20773296.

The previous prime is 38949917. The next prime is 38949947. The reversal of 38949945 is 54994983.

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

It is not a de Polignac number, because 38949945 - 2⁵ = 38949913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38949947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298317 + ... + 1298346.

It is an arithmetic number, because the mean of its divisors is an integer number (7789992).

Almost surely, 2^38949945 is an apocalyptic number.

It is an amenable number.

38949945 is a deficient number, since it is larger than the sum of its proper divisors (23369991).

38949945 is a wasteful number, since it uses less digits than its factorization.

38949945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596671.

The product of its digits is 1399680, while the sum is 51.

The square root of 38949945 is about 6240.9891043007. The cubic root of 38949945 is about 338.9759992058.

The spelling of 38949945 in words is "thirty-eight million, nine hundred forty-nine thousand, nine hundred forty-five".