6398432280 has 48 divisors (see below), whose sum is σ = 20794906080. Its totient is φ = 1706248512.

The previous prime is 6398432213. The next prime is 6398432291. The reversal of 6398432280 is 822348936.

6398432280 is a `hidden beast` number, since 639 + 8 + 4 + 3 + 2 + 2 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8886352 + ... + 8887071.

It is an arithmetic number, because the mean of its divisors is an integer number (433227210).

Almost surely, 2^6398432280 is an apocalyptic number.

6398432280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6398432280 is an abundant number, since it is smaller than the sum of its proper divisors (14396473800).

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

6398432280 is a wasteful number, since it uses less digits than its factorization.

6398432280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17773440 (or 17773433 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 6398432280 is about 79990.2011498909. The cubic root of 6398432280 is about 1856.4839229058.

The spelling of 6398432280 in words is "six billion, three hundred ninety-eight million, four hundred thirty-two thousand, two hundred eighty".