38662021 has 4 divisors (see below), whose sum is σ = 38740000. Its totient is φ = 38584044.

The previous prime is 38662009. The next prime is 38662027. The reversal of 38662021 is 12026683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38662021 - 2⁹ = 38661509 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 (38662027) 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, 38241 + ... + 39238.

It is an arithmetic number, because the mean of its divisors is an integer number (9685000).

Almost surely, 2^38662021 is an apocalyptic number.

It is an amenable number.

38662021 is a deficient number, since it is larger than the sum of its proper divisors (77979).

38662021 is an equidigital number, since it uses as much as digits as its factorization.

38662021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77978.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 38662021 is about 6217.8791400284. The cubic root of 38662021 is about 338.1386783155.

The spelling of 38662021 in words is "thirty-eight million, six hundred sixty-two thousand, twenty-one".