238691420 has 48 divisors (see below), whose sum is σ = 551190528. Its totient is φ = 86103360.

The previous prime is 238691419. The next prime is 238691437. The reversal of 238691420 is 24196832.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23669 + ... + 32211.

It is an arithmetic number, because the mean of its divisors is an integer number (11483136).

Almost surely, 2^238691420 is an apocalyptic number.

238691420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238691420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275595264).

238691420 is an abundant number, since it is smaller than the sum of its proper divisors (312499108).

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

238691420 is a wasteful number, since it uses less digits than its factorization.

238691420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690 (or 8688 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 238691420 is about 15449.6414197871. The cubic root of 238691420 is about 620.3149804311.

The spelling of 238691420 in words is "two hundred thirty-eight million, six hundred ninety-one thousand, four hundred twenty".