6390628480 has 64 divisors (see below), whose sum is σ = 15375147480. Its totient is φ = 2539929600.

The previous prime is 6390628469. The next prime is 6390628487. The reversal of 6390628480 is 848260936.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5692400704 + 698227776 = 75448^2 + 26424^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×6390628480² = 81680264738774220800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6390628480.

It is not an unprimeable number, because it can be changed into a prime (6390628487) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68680 + ... + 132280.

Almost surely, 2^6390628480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6390628480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7687573740).

6390628480 is an abundant number, since it is smaller than the sum of its proper divisors (8984519000).

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

6390628480 is a wasteful number, since it uses less digits than its factorization.

6390628480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63777 (or 63765 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 6390628480 is about 79941.4065425421. The cubic root of 6390628480 is about 1855.7288669532.

The spelling of 6390628480 in words is "six billion, three hundred ninety million, six hundred twenty-eight thousand, four hundred eighty".