238963290 has 32 divisors (see below), whose sum is σ = 575052480. Its totient is φ = 63552384.

The previous prime is 238963289. The next prime is 238963297. The reversal of 238963290 is 92369832.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (238963297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862 + ... + 21878.

It is an arithmetic number, because the mean of its divisors is an integer number (17970390).

Almost surely, 2^238963290 is an apocalyptic number.

238963290 is an abundant number, since it is smaller than the sum of its proper divisors (336089190).

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

238963290 is a wasteful number, since it uses less digits than its factorization.

238963290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21406.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 238963290 is about 15458.4375018952. The cubic root of 238963290 is about 620.5504044013.

The spelling of 238963290 in words is "two hundred thirty-eight million, nine hundred sixty-three thousand, two hundred ninety".