647481100 has 144 divisors (see below), whose sum is σ = 1680448000. Its totient is φ = 216336960.

The previous prime is 647481083. The next prime is 647481103. The reversal of 647481100 is 1184746.

647481100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×647481100³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (647481103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1474681 + ... + 1475119.

Almost surely, 2^647481100 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 647481100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840224000).

647481100 is an abundant number, since it is smaller than the sum of its proper divisors (1032966900).

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

647481100 is a wasteful number, since it uses less digits than its factorization.

647481100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 647481100 is about 25445.6499229240. The cubic root of 647481100 is about 865.1186980016.

The spelling of 647481100 in words is "six hundred forty-seven million, four hundred eighty-one thousand, one hundred".