38631021 has 32 divisors (see below), whose sum is σ = 64084608. Its totient is φ = 20336640.

The previous prime is 38630981. The next prime is 38631031. The reversal of 38631021 is 12013683.

It is not a de Polignac number, because 38631021 - 2⁶ = 38630957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38630982 and 38631000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38631031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4645 + ... + 9941.

It is an arithmetic number, because the mean of its divisors is an integer number (2002644).

Almost surely, 2^38631021 is an apocalyptic number.

It is an amenable number.

38631021 is a deficient number, since it is larger than the sum of its proper divisors (25453587).

38631021 is a wasteful number, since it uses less digits than its factorization.

38631021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5341.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 38631021 is about 6215.3858287318. The cubic root of 38631021 is about 338.0482786446.

It can be divided in two parts, 3863 and 1021, that added together give a palindrome (4884).

The spelling of 38631021 in words is "thirty-eight million, six hundred thirty-one thousand, twenty-one".