38786021 has 8 divisors (see below), whose sum is σ = 40261080. Its totient is φ = 37320192.

The previous prime is 38786003. The next prime is 38786029. The reversal of 38786021 is 12068783.

It can be written as a sum of positive squares in 4 ways, for example, as 172225 + 38613796 = 415^2 + 6214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38786021 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 (38786029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6941 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (5032635).

Almost surely, 2^38786021 is an apocalyptic number.

It is an amenable number.

38786021 is a deficient number, since it is larger than the sum of its proper divisors (1475059).

38786021 is a wasteful number, since it uses less digits than its factorization.

38786021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 38786021 is about 6227.8424032726. The cubic root of 38786021 is about 338.4997945434.

The spelling of 38786021 in words is "thirty-eight million, seven hundred eighty-six thousand, twenty-one".