38139669 has 24 divisors (see below), whose sum is σ = 59997600. Its totient is φ = 23254560.

The previous prime is 38139649. The next prime is 38139677. The reversal of 38139669 is 96693183.

It is not a de Polignac number, because 38139669 - 2¹¹ = 38137621 is a prime.

It is a super-2 number, since 2×38139669² = 2909268702859122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38139649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1114 + ... + 8804.

It is an arithmetic number, because the mean of its divisors is an integer number (2499900).

Almost surely, 2^38139669 is an apocalyptic number.

It is an amenable number.

38139669 is a deficient number, since it is larger than the sum of its proper divisors (21857931).

38139669 is a wasteful number, since it uses less digits than its factorization.

38139669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7745 (or 7742 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 38139669 is about 6175.7322642744. The cubic root of 38139669 is about 336.6089350844.

The spelling of 38139669 in words is "thirty-eight million, one hundred thirty-nine thousand, six hundred sixty-nine".