38128589 has 4 divisors (see below), whose sum is σ = 38236956. Its totient is φ = 38020224.

The previous prime is 38128583. The next prime is 38128619. The reversal of 38128589 is 98582183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98582183 = 7 ⋅14083169.

It can be written as a sum of positive squares in 2 ways, for example, as 22486564 + 15642025 = 4742^2 + 3955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38128589 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 (38128583) 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, 53654 + ... + 54359.

It is an arithmetic number, because the mean of its divisors is an integer number (9559239).

Almost surely, 2^38128589 is an apocalyptic number.

It is an amenable number.

38128589 is a deficient number, since it is larger than the sum of its proper divisors (108367).

38128589 is a wasteful number, since it uses less digits than its factorization.

38128589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108366.

The product of its digits is 138240, while the sum is 44.

The square root of 38128589 is about 6174.8351394997. The cubic root of 38128589 is about 336.5763357084.

The spelling of 38128589 in words is "thirty-eight million, one hundred twenty-eight thousand, five hundred eighty-nine".