38694389 has 4 divisors (see below), whose sum is σ = 38713260. Its totient is φ = 38675520.

The previous prime is 38694379. The next prime is 38694419. The reversal of 38694389 is 98349683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98349683 = 353 ⋅278611.

It can be written as a sum of positive squares in 2 ways, for example, as 30713764 + 7980625 = 5542^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 38694389 - 2²⁴ = 21917173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38694379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5924 + ... + 10605.

It is an arithmetic number, because the mean of its divisors is an integer number (9678315).

Almost surely, 2^38694389 is an apocalyptic number.

It is an amenable number.

38694389 is a deficient number, since it is larger than the sum of its proper divisors (18871).

38694389 is a wasteful number, since it uses less digits than its factorization.

38694389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18870.

The product of its digits is 1119744, while the sum is 50.

The square root of 38694389 is about 6220.4814122381. The cubic root of 38694389 is about 338.2330156825.

The spelling of 38694389 in words is "thirty-eight million, six hundred ninety-four thousand, three hundred eighty-nine".