647771104 has 48 divisors (see below), whose sum is σ = 1347857280. Its totient is φ = 305596800.

The previous prime is 647771101. The next prime is 647771129. The reversal of 647771104 is 401177746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647771101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157879 + ... + 161929.

It is an arithmetic number, because the mean of its divisors is an integer number (28080360).

Almost surely, 2^647771104 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 647771104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673928640).

647771104 is an abundant number, since it is smaller than the sum of its proper divisors (700086176).

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

647771104 is a wasteful number, since it uses less digits than its factorization.

647771104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343 (or 4335 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 647771104 is about 25451.3477835654. The cubic root of 647771104 is about 865.2478397043.

The spelling of 647771104 in words is "six hundred forty-seven million, seven hundred seventy-one thousand, one hundred four".