38640969 has 20 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 25394040.

The previous prime is 38640947. The next prime is 38640971. The reversal of 38640969 is 96904683.

38640969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38640969 - 2⁵ = 38640937 is a prime.

It is a super-2 number, since 2×38640969² = 2986248970517922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38640769) 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 19 ways as a sum of consecutive naturals, for example, 2392 + ... + 9110.

It is an arithmetic number, because the mean of its divisors is an integer number (2927232).

Almost surely, 2^38640969 is an apocalyptic number.

It is an amenable number.

38640969 is a deficient number, since it is larger than the sum of its proper divisors (19903671).

38640969 is an equidigital number, since it uses as much as digits as its factorization.

38640969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802 (or 6793 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 38640969 is about 6216.1860493393. The cubic root of 38640969 is about 338.0772934585.

The spelling of 38640969 in words is "thirty-eight million, six hundred forty thousand, nine hundred sixty-nine".