238479477940 has 24 divisors (see below), whose sum is σ = 546334804512. Its totient is φ = 86719810080.

The previous prime is 238479477937. The next prime is 238479477947. The reversal of 238479477940 is 49774974832.

238479477940 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 2×238479477940² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238479477947) 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, 541998594 + ... + 541999033.

It is an arithmetic number, because the mean of its divisors is an integer number (22763950188).

Almost surely, 2^238479477940 is an apocalyptic number.

238479477940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238479477940 is an abundant number, since it is smaller than the sum of its proper divisors (307855326572).

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

238479477940 is a wasteful number, since it uses less digits than its factorization.

238479477940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083997647 (or 1083997645 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 238479477940 in words is "two hundred thirty-eight billion, four hundred seventy-nine million, four hundred seventy-seven thousand, nine hundred forty".