654664240 has 40 divisors (see below), whose sum is σ = 1523317680. Its totient is φ = 261655296.

The previous prime is 654664217. The next prime is 654664253. The reversal of 654664240 is 42466456.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 654664240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130906 + ... + 135814.

It is an arithmetic number, because the mean of its divisors is an integer number (38082942).

Almost surely, 2^654664240 is an apocalyptic number.

It is an amenable number.

654664240 is an abundant number, since it is smaller than the sum of its proper divisors (868653440).

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

654664240 is a wasteful number, since it uses less digits than its factorization.

654664240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6589 (or 6583 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 654664240 is about 25586.4073288924. The cubic root of 654664240 is about 868.3061418789.

The spelling of 654664240 in words is "six hundred fifty-four million, six hundred sixty-four thousand, two hundred forty".