38547989 has 4 divisors (see below), whose sum is σ = 39877260. Its totient is φ = 37218720.

The previous prime is 38547983. The next prime is 38548001. The reversal of 38547989 is 98974583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16851025 + 21696964 = 4105^2 + 4658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38547989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38547989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38547983) 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, 664592 + ... + 664649.

It is an arithmetic number, because the mean of its divisors is an integer number (9969315).

Almost surely, 2^38547989 is an apocalyptic number.

It is an amenable number.

38547989 is a deficient number, since it is larger than the sum of its proper divisors (1329271).

38547989 is a wasteful number, since it uses less digits than its factorization.

38547989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329270.

The product of its digits is 2177280, while the sum is 53.

The square root of 38547989 is about 6208.7026825256. The cubic root of 38547989 is about 337.8059090152.

The spelling of 38547989 in words is "thirty-eight million, five hundred forty-seven thousand, nine hundred eighty-nine".