647340144 has 160 divisors (see below), whose sum is σ = 1979873280. Its totient is φ = 180019200.

The previous prime is 647340119. The next prime is 647340149. The reversal of 647340144 is 441043746.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647340149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367137 + ... + 368895.

It is an arithmetic number, because the mean of its divisors is an integer number (12374208).

Almost surely, 2^647340144 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 647340144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989936640).

647340144 is an abundant number, since it is smaller than the sum of its proper divisors (1332533136).

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

647340144 is a wasteful number, since it uses less digits than its factorization.

647340144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 647340144 is about 25442.8800256575. The cubic root of 647340144 is about 865.0559149483.

The spelling of 647340144 in words is "six hundred forty-seven million, three hundred forty thousand, one hundred forty-four".