647312352 has 48 divisors (see below), whose sum is σ = 1719688320. Its totient is φ = 213168512.

The previous prime is 647312329. The next prime is 647312359. The reversal of 647312352 is 253213746.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647312359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32652 + ... + 48587.

It is an arithmetic number, because the mean of its divisors is an integer number (35826840).

Almost surely, 2^647312352 is an apocalyptic number.

It is an amenable number.

647312352 is an abundant number, since it is smaller than the sum of its proper divisors (1072375968).

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

647312352 is a wasteful number, since it uses less digits than its factorization.

647312352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81335 (or 81327 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 647312352 is about 25442.3338552107. Note that the first 3 decimals coincide. The cubic root of 647312352 is about 865.0435350693.

The spelling of 647312352 in words is "six hundred forty-seven million, three hundred twelve thousand, three hundred fifty-two".