647938254 has 16 divisors (see below), whose sum is σ = 1337679360. Its totient is φ = 209012280.

The previous prime is 647938243. The next prime is 647938259. The reversal of 647938254 is 452839746.

647938254 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 not an unprimeable number, because it can be changed into a prime (647938259) 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, 1741584 + ... + 1741955.

It is an arithmetic number, because the mean of its divisors is an integer number (83604960).

Almost surely, 2^647938254 is an apocalyptic number.

647938254 is an abundant number, since it is smaller than the sum of its proper divisors (689741106).

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

647938254 is a wasteful number, since it uses less digits than its factorization.

647938254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483575.

The product of its digits is 1451520, while the sum is 48.

The square root of 647938254 is about 25454.6312878423. The cubic root of 647938254 is about 865.3222557737.

The spelling of 647938254 in words is "six hundred forty-seven million, nine hundred thirty-eight thousand, two hundred fifty-four".