38670021 has 48 divisors (see below), whose sum is σ = 64384320. Its totient is φ = 22800960.

The previous prime is 38670017. The next prime is 38670041. The reversal of 38670021 is 12007683.

It is not a de Polignac number, because 38670021 - 2² = 38670017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38670001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295126 + ... + 295256.

It is an arithmetic number, because the mean of its divisors is an integer number (1341340).

Almost surely, 2^38670021 is an apocalyptic number.

It is an amenable number.

38670021 is a deficient number, since it is larger than the sum of its proper divisors (25714299).

38670021 is a wasteful number, since it uses less digits than its factorization.

38670021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 38670021 is about 6218.5224129209. The cubic root of 38670021 is about 338.1619994180.

It can be divided in two parts, 386 and 70021, that added together give a palindrome (70407).

The spelling of 38670021 in words is "thirty-eight million, six hundred seventy thousand, twenty-one".