646847488 has 176 divisors, whose sum is σ = 1584672768. Its totient is φ = 258048000.

The previous prime is 646847473. The next prime is 646847489. The reversal of 646847488 is 884748646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646847489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9110493 + ... + 9110563.

Almost surely, 2^646847488 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 646847488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792336384).

646847488 is an abundant number, since it is smaller than the sum of its proper divisors (937825280).

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

646847488 is a wasteful number, since it uses less digits than its factorization.

646847488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 152 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 55.

The square root of 646847488 is about 25433.1965745559. The cubic root of 646847488 is about 864.8364099737.

It can be divided in two parts, 6468 and 47488, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 646847488 in words is "six hundred forty-six million, eight hundred forty-seven thousand, four hundred eighty-eight".