238590690 has 64 divisors (see below), whose sum is σ = 627177600. Its totient is φ = 57729024.

The previous prime is 238590679. The next prime is 238590691. The reversal of 238590690 is 96095832.

238590690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×238590690² = 113851034709352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238590691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17826 + ... + 28194.

It is an arithmetic number, because the mean of its divisors is an integer number (9799650).

Almost surely, 2^238590690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238590690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313588800).

238590690 is an abundant number, since it is smaller than the sum of its proper divisors (388586910).

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

238590690 is a wasteful number, since it uses less digits than its factorization.

238590690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 238590690 is about 15446.3811295721. The cubic root of 238590690 is about 620.2277085891.

The spelling of 238590690 in words is "two hundred thirty-eight million, five hundred ninety thousand, six hundred ninety".