647243492 has 24 divisors (see below), whose sum is σ = 1303807680. Its totient is φ = 275392800.

The previous prime is 647243453. The next prime is 647243501. The reversal of 647243492 is 294342746.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 79259 + ... + 87042.

It is an arithmetic number, because the mean of its divisors is an integer number (54325320).

Almost surely, 2^647243492 is an apocalyptic number.

It is an amenable number.

647243492 is an abundant number, since it is smaller than the sum of its proper divisors (656564188).

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

647243492 is a wasteful number, since it uses less digits than its factorization.

647243492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166451 (or 166449 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 647243492 is about 25440.9805628635. The cubic root of 647243492 is about 865.0128600224.

The spelling of 647243492 in words is "six hundred forty-seven million, two hundred forty-three thousand, four hundred ninety-two".