38821830 has 16 divisors (see below), whose sum is σ = 93172464. Its totient is φ = 10352480.

The previous prime is 38821817. The next prime is 38821831. The reversal of 38821830 is 3812883.

38821830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38821791 and 38821800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38821831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647001 + ... + 647060.

It is an arithmetic number, because the mean of its divisors is an integer number (5823279).

Almost surely, 2^38821830 is an apocalyptic number.

38821830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38821830 is an abundant number, since it is smaller than the sum of its proper divisors (54350634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38821830 is a wasteful number, since it uses less digits than its factorization.

38821830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294071.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 38821830 is about 6230.7166521998. The cubic root of 38821830 is about 338.6039352486.

The spelling of 38821830 in words is "thirty-eight million, eight hundred twenty-one thousand, eight hundred thirty".