38969945 has 32 divisors (see below), whose sum is σ = 56371200. Its totient is φ = 25824960.

The previous prime is 38969927. The next prime is 38969977. The reversal of 38969945 is 54996983.

It is not a de Polignac number, because 38969945 - 2¹⁰ = 38968921 is a prime.

It is a super-2 number, since 2×38969945² = 3037313226606050, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 52799 + ... + 53531.

It is an arithmetic number, because the mean of its divisors is an integer number (1761600).

Almost surely, 2^38969945 is an apocalyptic number.

38969945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38969945 is a deficient number, since it is larger than the sum of its proper divisors (17401255).

38969945 is an equidigital number, since it uses as much as digits as its factorization.

38969945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 776 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 38969945 is about 6242.5912087850. The cubic root of 38969945 is about 339.0340083586.

The spelling of 38969945 in words is "thirty-eight million, nine hundred sixty-nine thousand, nine hundred forty-five".