38890000 has 50 divisors (see below), whose sum is σ = 94180790. Its totient is φ = 15552000.

The previous prime is 38889989. The next prime is 38890003. The reversal of 38890000 is 9883.

It can be written as a sum of positive squares in 5 ways, for example, as 10969344 + 27920656 = 3312^2 + 5284^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (38890003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8056 + ... + 11944.

Almost surely, 2^38890000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47090395).

38890000 is an abundant number, since it is smaller than the sum of its proper divisors (55290790).

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

38890000 is an equidigital number, since it uses as much as digits as its factorization.

38890000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917 (or 3896 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 38890000 is about 6236.1847310675. The cubic root of 38890000 is about 338.8020122293.

Adding to 38890000 its reverse (9883), we get a palindrome (38899883).

The spelling of 38890000 in words is "thirty-eight million, eight hundred ninety thousand".