647383140 has 36 divisors (see below), whose sum is σ = 1963729404. Its totient is φ = 172635456.

The previous prime is 647383129. The next prime is 647383169. The reversal of 647383140 is 41383746.

647383140 is a `hidden beast` number, since 647 + 3 + 8 + 3 + 1 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120956004 + 526427136 = 10998^2 + 22944^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 647383095 and 647383104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1798107 + ... + 1798466.

It is an arithmetic number, because the mean of its divisors is an integer number (54548039).

Almost surely, 2^647383140 is an apocalyptic number.

647383140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

647383140 is an abundant number, since it is smaller than the sum of its proper divisors (1316346264).

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

647383140 is a wasteful number, since it uses less digits than its factorization.

647383140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596588 (or 3596583 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 647383140 is about 25443.7249631417. The cubic root of 647383140 is about 865.0750667142.

The spelling of 647383140 in words is "six hundred forty-seven million, three hundred eighty-three thousand, one hundred forty".