38400220 has 12 divisors (see below), whose sum is σ = 80640504. Its totient is φ = 15360080.

The previous prime is 38400211. The next prime is 38400221. The reversal of 38400220 is 2200483.

It is a happy number.

38400220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959986 + ... + 960025.

It is an arithmetic number, because the mean of its divisors is an integer number (6720042).

Almost surely, 2^38400220 is an apocalyptic number.

It is an amenable number.

38400220 is an abundant number, since it is smaller than the sum of its proper divisors (42240284).

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

38400220 is a wasteful number, since it uses less digits than its factorization.

38400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920020 (or 1920018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 38400220 is about 6196.7911050801. The cubic root of 38400220 is about 337.3737104083.

The spelling of 38400220 in words is "thirty-eight million, four hundred thousand, two hundred twenty".