38521636 has 12 divisors (see below), whose sum is σ = 68980912. Its totient is φ = 18812808.

The previous prime is 38521633. The next prime is 38521649. The reversal of 38521636 is 63612583.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (38521633) 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, 111810 + ... + 112153.

Almost surely, 2^38521636 is an apocalyptic number.

It is an amenable number.

38521636 is a deficient number, since it is larger than the sum of its proper divisors (30459276).

38521636 is a wasteful number, since it uses less digits than its factorization.

38521636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224010 (or 224008 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 38521636 is about 6206.5800566818. The cubic root of 38521636 is about 337.7289121017.

The spelling of 38521636 in words is "thirty-eight million, five hundred twenty-one thousand, six hundred thirty-six".