38236621 has 4 divisors (see below), whose sum is σ = 40485852. Its totient is φ = 35987392.

The previous prime is 38236619. The next prime is 38236631. The reversal of 38236621 is 12663283.

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 33988900 + 4247721 = 5830^2 + 2061^2 .

It is a cyclic number.

It is not a de Polignac number, because 38236621 - 2¹ = 38236619 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38236631) 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, 1124590 + ... + 1124623.

It is an arithmetic number, because the mean of its divisors is an integer number (10121463).

Almost surely, 2^38236621 is an apocalyptic number.

It is an amenable number.

38236621 is a deficient number, since it is larger than the sum of its proper divisors (2249231).

38236621 is a wasteful number, since it uses less digits than its factorization.

38236621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249230.

The product of its digits is 10368, while the sum is 31.

The square root of 38236621 is about 6183.5767157851. The cubic root of 38236621 is about 336.8939165433.

The spelling of 38236621 in words is "thirty-eight million, two hundred thirty-six thousand, six hundred twenty-one".