6423938988 has 96 divisors (see below), whose sum is σ = 17021975040. Its totient is φ = 1873198080.

The previous prime is 6423938981. The next prime is 6423939023. The reversal of 6423938988 is 8898393246.

It is not an unprimeable number, because it can be changed into a prime (6423938981) 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, 189793 + ... + 221063.

It is an arithmetic number, because the mean of its divisors is an integer number (177312240).

Almost surely, 2^6423938988 is an apocalyptic number.

6423938988 is a gapful number since it is divisible by the number (68) 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 6423938988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8510987520).

6423938988 is an abundant number, since it is smaller than the sum of its proper divisors (10598036052).

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

6423938988 is a wasteful number, since it uses less digits than its factorization.

6423938988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31367 (or 31365 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 60.

The square root of 6423938988 is about 80149.4790251315. The cubic root of 6423938988 is about 1858.9475477364.

The spelling of 6423938988 in words is "six billion, four hundred twenty-three million, nine hundred thirty-eight thousand, nine hundred eighty-eight".