6422399280 has 300 divisors, whose sum is σ = 24521097216. Its totient is φ = 1556755200.

The previous prime is 6422399251. The next prime is 6422399297. The reversal of 6422399280 is 829932246.

6422399280 is a `hidden beast` number, since 64 + 223 + 99 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 779985 + ... + 788175.

Almost surely, 2^6422399280 is an apocalyptic number.

6422399280 is a gapful number since it is divisible by the number (60) 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 6422399280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12260548608).

6422399280 is an abundant number, since it is smaller than the sum of its proper divisors (18098697936).

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

6422399280 is a wasteful number, since it uses less digits than its factorization.

6422399280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238 (or 8212 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 6422399280 is about 80139.8732217615. The cubic root of 6422399280 is about 1858.7990165874.

The spelling of 6422399280 in words is "six billion, four hundred twenty-two million, three hundred ninety-nine thousand, two hundred eighty".