654404440 has 16 divisors (see below), whose sum is σ = 1472410080. Its totient is φ = 261761760.

The previous prime is 654404431. The next prime is 654404501. The reversal of 654404440 is 44404456.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8180016 + ... + 8180095.

It is an arithmetic number, because the mean of its divisors is an integer number (92025630).

Almost surely, 2^654404440 is an apocalyptic number.

It is an amenable number.

654404440 is an abundant number, since it is smaller than the sum of its proper divisors (818005640).

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

654404440 is a wasteful number, since it uses less digits than its factorization.

654404440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16360122 (or 16360118 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 654404440 is about 25581.3299106985. The cubic root of 654404440 is about 868.1912657998.

Adding to 654404440 its reverse (44404456), we get a palindrome (698808896).

The spelling of 654404440 in words is "six hundred fifty-four million, four hundred four thousand, four hundred forty".