238805490 has 128 divisors (see below), whose sum is σ = 752302080. Its totient is φ = 47001600.

The previous prime is 238805473. The next prime is 238805503. The reversal of 238805490 is 94508832.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41170 + ... + 46610.

It is an arithmetic number, because the mean of its divisors is an integer number (5877360).

Almost surely, 2^238805490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238805490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376151040).

238805490 is an abundant number, since it is smaller than the sum of its proper divisors (513496590).

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

238805490 is a wasteful number, since it uses less digits than its factorization.

238805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 238805490 is about 15453.3326502732. The cubic root of 238805490 is about 620.4137803250.

The spelling of 238805490 in words is "two hundred thirty-eight million, eight hundred five thousand, four hundred ninety".