647505742 has 32 divisors (see below), whose sum is σ = 1092833280. Its totient is φ = 285694560.

The previous prime is 647505713. The next prime is 647505751. The reversal of 647505742 is 247505746.

It is a junction number, because it is equal to n+sod(n) for n = 647505695 and 647505704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62059 + ... + 71737.

It is an arithmetic number, because the mean of its divisors is an integer number (34151040).

Almost surely, 2^647505742 is an apocalyptic number.

647505742 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

647505742 is a deficient number, since it is larger than the sum of its proper divisors (445327538).

647505742 is a wasteful number, since it uses less digits than its factorization.

647505742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808.

The product of its (nonzero) digits is 235200, while the sum is 40.

The square root of 647505742 is about 25446.1341268178. The cubic root of 647505742 is about 865.1296728314.

The spelling of 647505742 in words is "six hundred forty-seven million, five hundred five thousand, seven hundred forty-two".