647903040 has 112 divisors (see below), whose sum is σ = 2165421120. Its totient is φ = 163676160.

The previous prime is 647903027. The next prime is 647903051. The reversal of 647903040 is 40309746.

It is a junction number, because it is equal to n+sod(n) for n = 647902992 and 647903010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 36000.

Almost surely, 2^647903040 is an apocalyptic number.

647903040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647903040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082710560).

647903040 is an abundant number, since it is smaller than the sum of its proper divisors (1517518080).

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

647903040 is a wasteful number, since it uses less digits than its factorization.

647903040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35560 (or 35550 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 647903040 is about 25453.9395772049. The cubic root of 647903040 is about 865.3065793778.

The spelling of 647903040 in words is "six hundred forty-seven million, nine hundred three thousand, forty".