647642254 has 32 divisors (see below), whose sum is σ = 1125476352. Its totient is φ = 273780000.

The previous prime is 647642249. The next prime is 647642279. The reversal of 647642254 is 452246746.

647642254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 330979 + ... + 332929.

It is an arithmetic number, because the mean of its divisors is an integer number (35171136).

Almost surely, 2^647642254 is an apocalyptic number.

647642254 is a deficient number, since it is larger than the sum of its proper divisors (477834098).

647642254 is a wasteful number, since it uses less digits than its factorization.

647642254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272.

The product of its digits is 322560, while the sum is 40.

The square root of 647642254 is about 25448.8163575440. The cubic root of 647642254 is about 865.1904662605.

The spelling of 647642254 in words is "six hundred forty-seven million, six hundred forty-two thousand, two hundred fifty-four".