647938722 has 16 divisors (see below), whose sum is σ = 1364081760. Its totient is φ = 204612192.

The previous prime is 647938721. The next prime is 647938747. The reversal of 647938722 is 227839746.

It is not an unprimeable number, because it can be changed into a prime (647938721) 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, 2841723 + ... + 2841950.

It is an arithmetic number, because the mean of its divisors is an integer number (85255110).

Almost surely, 2^647938722 is an apocalyptic number.

647938722 is an abundant number, since it is smaller than the sum of its proper divisors (716143038).

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

647938722 is a wasteful number, since it uses less digits than its factorization.

647938722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683697.

The product of its digits is 1016064, while the sum is 48.

The square root of 647938722 is about 25454.6404806668. The cubic root of 647938722 is about 865.3224641119.

The spelling of 647938722 in words is "six hundred forty-seven million, nine hundred thirty-eight thousand, seven hundred twenty-two".