6390287556 has 96 divisors (see below), whose sum is σ = 16690101120. Its totient is φ = 1891123200.

The previous prime is 6390287549. The next prime is 6390287557. The reversal of 6390287556 is 6557820936.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 6390287499 and 6390287508.

It is not an unprimeable number, because it can be changed into a prime (6390287557) 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, 930696 + ... + 937536.

It is an arithmetic number, because the mean of its divisors is an integer number (173855220).

Almost surely, 2^6390287556 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 6390287556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8345050560).

6390287556 is an abundant number, since it is smaller than the sum of its proper divisors (10299813564).

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

6390287556 is a wasteful number, since it uses less digits than its factorization.

6390287556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125 (or 7123 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 6390287556 is about 79939.2741773404. The cubic root of 6390287556 is about 1855.6958668729.

The spelling of 6390287556 in words is "six billion, three hundred ninety million, two hundred eighty-seven thousand, five hundred fifty-six".