647528436 has 144 divisors (see below), whose sum is σ = 1839801600. Its totient is φ = 190826496.

The previous prime is 647528411. The next prime is 647528459. The reversal of 647528436 is 634825746.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 647528391 and 647528400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2709205 + ... + 2709443.

It is an arithmetic number, because the mean of its divisors is an integer number (12776400).

Almost surely, 2^647528436 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 647528436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919900800).

647528436 is an abundant number, since it is smaller than the sum of its proper divisors (1192273164).

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

647528436 is a wasteful number, since it uses less digits than its factorization.

647528436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 513 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 647528436 is about 25446.5800452634. The cubic root of 647528436 is about 865.1397798323.

The spelling of 647528436 in words is "six hundred forty-seven million, five hundred twenty-eight thousand, four hundred thirty-six".