647069632 has 56 divisors (see below), whose sum is σ = 1411193520. Its totient is φ = 291932160.

The previous prime is 647069627. The next prime is 647069641. The reversal of 647069632 is 236960746.

647069632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93094 + ... + 99802.

Almost surely, 2^647069632 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 647069632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705596760).

647069632 is an abundant number, since it is smaller than the sum of its proper divisors (764123888).

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

647069632 is a wasteful number, since it uses less digits than its factorization.

647069632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869 (or 6859 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 647069632 is about 25437.5634053264. The cubic root of 647069632 is about 864.9354009695.

The spelling of 647069632 in words is "six hundred forty-seven million, sixty-nine thousand, six hundred thirty-two".