38404220 has 12 divisors (see below), whose sum is σ = 80648904. Its totient is φ = 15361680.

The previous prime is 38404211. The next prime is 38404231. The reversal of 38404220 is 2240483.

It is a super-2 number, since 2×38404220² = 2949768227616800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960086 + ... + 960125.

It is an arithmetic number, because the mean of its divisors is an integer number (6720742).

Almost surely, 2^38404220 is an apocalyptic number.

It is an amenable number.

38404220 is an abundant number, since it is smaller than the sum of its proper divisors (42244684).

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

38404220 is a wasteful number, since it uses less digits than its factorization.

38404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920220 (or 1920218 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 38404220 is about 6197.1138443634. The cubic root of 38404220 is about 337.3854242994.

The spelling of 38404220 in words is "thirty-eight million, four hundred four thousand, two hundred twenty".