38409643 has 6 divisors (see below), whose sum is σ = 38625612. Its totient is φ = 38194740.

The previous prime is 38409619. The next prime is 38409653. The reversal of 38409643 is 34690483.

It is not a de Polignac number, because 38409643 - 2²⁵ = 4855211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38409653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73180 + ... + 73702.

It is an arithmetic number, because the mean of its divisors is an integer number (6437602).

Almost surely, 2^38409643 is an apocalyptic number.

38409643 is a deficient number, since it is larger than the sum of its proper divisors (215969).

38409643 is an frugal number, since it uses more digits than its factorization.

38409643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 38409643 is about 6197.5513713079. The cubic root of 38409643 is about 337.4013041085.

The spelling of 38409643 in words is "thirty-eight million, four hundred nine thousand, six hundred forty-three".