647240370 has 64 divisors (see below), whose sum is σ = 1782190080. Its totient is φ = 147365568.

The previous prime is 647240369. The next prime is 647240381. The reversal of 647240370 is 73042746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49371 + ... + 61089.

It is an arithmetic number, because the mean of its divisors is an integer number (27846720).

Almost surely, 2^647240370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647240370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891095040).

647240370 is an abundant number, since it is smaller than the sum of its proper divisors (1134949710).

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

647240370 is a wasteful number, since it uses less digits than its factorization.

647240370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 647240370 is about 25440.9192050916. The cubic root of 647240370 is about 865.0114692143.

The spelling of 647240370 in words is "six hundred forty-seven million, two hundred forty thousand, three hundred seventy".