38220928 has 16 divisors (see below), whose sum is σ = 76143510. Its totient is φ = 19110400.

The previous prime is 38220893. The next prime is 38220929. The reversal of 38220928 is 82902283.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29506624 + 8714304 = 5432^2 + 2952^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 38220893 and 38220902.

It is not an unprimeable number, because it can be changed into a prime (38220929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149173 + ... + 149428.

Almost surely, 2^38220928 is an apocalyptic number.

It is an amenable number.

38220928 is a deficient number, since it is larger than the sum of its proper divisors (37922582).

38220928 is an equidigital number, since it uses as much as digits as its factorization.

38220928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298615 (or 298603 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 38220928 is about 6182.3076597659. The cubic root of 38220928 is about 336.8478211201.

The spelling of 38220928 in words is "thirty-eight million, two hundred twenty thousand, nine hundred twenty-eight".