647751090 has 96 divisors (see below), whose sum is σ = 1830548160. Its totient is φ = 146246016.

The previous prime is 647751073. The next prime is 647751101. The reversal of 647751090 is 90157746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119356 + ... + 124664.

It is an arithmetic number, because the mean of its divisors is an integer number (19068210).

Almost surely, 2^647751090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647751090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915274080).

647751090 is an abundant number, since it is smaller than the sum of its proper divisors (1182797070).

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

647751090 is a wasteful number, since it uses less digits than its factorization.

647751090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5416 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 647751090 is about 25450.9545989929. The cubic root of 647751090 is about 865.2389285068.

The spelling of 647751090 in words is "six hundred forty-seven million, seven hundred fifty-one thousand, ninety".