38219820 has 24 divisors (see below), whose sum is σ = 107015664. Its totient is φ = 10191936.

The previous prime is 38219809. The next prime is 38219821. The reversal of 38219820 is 2891283.

It is not an unprimeable number, because it can be changed into a prime (38219821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318439 + ... + 318558.

It is an arithmetic number, because the mean of its divisors is an integer number (4458986).

Almost surely, 2^38219820 is an apocalyptic number.

38219820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38219820 is an abundant number, since it is smaller than the sum of its proper divisors (68795844).

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

38219820 is a wasteful number, since it uses less digits than its factorization.

38219820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637009 (or 637007 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 38219820 is about 6182.2180485648. The cubic root of 38219820 is about 336.8445660885.

It can be divided in two parts, 382 and 19820, that added together give a palindrome (20202).

The spelling of 38219820 in words is "thirty-eight million, two hundred nineteen thousand, eight hundred twenty".