647624240 has 20 divisors (see below), whose sum is σ = 1505726544. Its totient is φ = 259049664.

The previous prime is 647624227. The next prime is 647624249. The reversal of 647624240 is 42426746.

647624240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 647624240.

It is not an unprimeable number, because it can be changed into a prime (647624249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4047572 + ... + 4047731.

Almost surely, 2^647624240 is an apocalyptic number.

It is an amenable number.

647624240 is an abundant number, since it is smaller than the sum of its proper divisors (858102304).

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

647624240 is a wasteful number, since it uses less digits than its factorization.

647624240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8095316 (or 8095310 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 647624240 is about 25448.4624289956. The cubic root of 647624240 is about 865.1824445039.

The spelling of 647624240 in words is "six hundred forty-seven million, six hundred twenty-four thousand, two hundred forty".