38223828 has 18 divisors (see below), whose sum is σ = 96621434. Its totient is φ = 12741264.

The previous prime is 38223821. The next prime is 38223841. The reversal of 38223828 is 82832283.

It can be written as a sum of positive squares in only one way, i.e., 32970564 + 5253264 = 5742^2 + 2292^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×38223828² = 2922122053947168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1061773 = 38223828 / (3 + 8 + 2 + 2 + 3 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 38223792 and 38223801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38223821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530851 + ... + 530922.

Almost surely, 2^38223828 is an apocalyptic number.

It is an amenable number.

38223828 is an abundant number, since it is smaller than the sum of its proper divisors (58397606).

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

38223828 is a wasteful number, since it uses less digits than its factorization.

38223828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061783 (or 1061778 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 38223828 is about 6182.5421955697. The cubic root of 38223828 is about 336.8563403095.

The spelling of 38223828 in words is "thirty-eight million, two hundred twenty-three thousand, eight hundred twenty-eight".