38813820 has 24 divisors (see below), whose sum is σ = 108678864. Its totient is φ = 10350336.

The previous prime is 38813791. The next prime is 38813833. The reversal of 38813820 is 2831883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323389 + ... + 323508.

It is an arithmetic number, because the mean of its divisors is an integer number (4528286).

Almost surely, 2^38813820 is an apocalyptic number.

38813820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38813820 is an abundant number, since it is smaller than the sum of its proper divisors (69865044).

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

38813820 is a wasteful number, since it uses less digits than its factorization.

38813820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646909 (or 646907 counting only the distinct ones).

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

The square root of 38813820 is about 6230.0738358385. The cubic root of 38813820 is about 338.5806459113.

The spelling of 38813820 in words is "thirty-eight million, eight hundred thirteen thousand, eight hundred twenty".