238909420 has 24 divisors (see below), whose sum is σ = 528116400. Its totient is φ = 90533952.

The previous prime is 238909409. The next prime is 238909423. The reversal of 238909420 is 24909832.

It is a self number, because there is not a number n which added to its sum of digits gives 238909420.

It is not an unprimeable number, because it can be changed into a prime (238909423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313975 + ... + 314734.

It is an arithmetic number, because the mean of its divisors is an integer number (22004850).

Almost surely, 2^238909420 is an apocalyptic number.

238909420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238909420 is an abundant number, since it is smaller than the sum of its proper divisors (289206980).

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

238909420 is a wasteful number, since it uses less digits than its factorization.

238909420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628737 (or 628735 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 238909420 is about 15456.6949895506. The cubic root of 238909420 is about 620.5037702333.

The spelling of 238909420 in words is "two hundred thirty-eight million, nine hundred nine thousand, four hundred twenty".