647946450 has 36 divisors (see below), whose sum is σ = 1740817338. Its totient is φ = 172785600.

The previous prime is 647946421. The next prime is 647946457. The reversal of 647946450 is 54649746.

647946450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 589469841 + 58476609 = 24279^2 + 7647^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 647946396 and 647946405.

It is not an unprimeable number, because it can be changed into a prime (647946457) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 719491 + ... + 720390.

Almost surely, 2^647946450 is an apocalyptic number.

647946450 is an abundant number, since it is smaller than the sum of its proper divisors (1092870888).

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

647946450 is a wasteful number, since it uses less digits than its factorization.

647946450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439899 (or 1439891 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 647946450 is about 25454.7922796475. The cubic root of 647946450 is about 865.3259043474.

The spelling of 647946450 in words is "six hundred forty-seven million, nine hundred forty-six thousand, four hundred fifty".