653346440 has 16 divisors (see below), whose sum is σ = 1470029580. Its totient is φ = 261338560.

The previous prime is 653346433. The next prime is 653346457. The reversal of 653346440 is 44643356.

It can be written as a sum of positive squares in 2 ways, for example, as 567487684 + 85858756 = 23822^2 + 9266^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 653346440.

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, 8166791 + ... + 8166870.

Almost surely, 2^653346440 is an apocalyptic number.

It is an amenable number.

653346440 is an abundant number, since it is smaller than the sum of its proper divisors (816683140).

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

653346440 is a wasteful number, since it uses less digits than its factorization.

653346440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16333672 (or 16333668 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 653346440 is about 25560.6424019429. The cubic root of 653346440 is about 867.7231343895.

Adding to 653346440 its reverse (44643356), we get a palindrome (697989796).

The spelling of 653346440 in words is "six hundred fifty-three million, three hundred forty-six thousand, four hundred forty".