38537861 has 6 divisors (see below), whose sum is σ = 40938450. Its totient is φ = 36270656.

The previous prime is 38537819. The next prime is 38537881. The reversal of 38537861 is 16873583.

It can be written as a sum of positive squares in 3 ways, for example, as 9647236 + 28890625 = 3106^2 + 5375^2 .

It is not a de Polignac number, because 38537861 - 2¹⁰ = 38536837 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 (38537881) 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, 66386 + ... + 66963.

It is an arithmetic number, because the mean of its divisors is an integer number (6823075).

Almost surely, 2^38537861 is an apocalyptic number.

It is an amenable number.

38537861 is a deficient number, since it is larger than the sum of its proper divisors (2400589).

38537861 is a wasteful number, since it uses less digits than its factorization.

38537861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133383 (or 133366 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 38537861 is about 6207.8869996159. The cubic root of 38537861 is about 337.7763216704.

The spelling of 38537861 in words is "thirty-eight million, five hundred thirty-seven thousand, eight hundred sixty-one".