657240448 has 16 divisors (see below), whose sum is σ = 1309346460. Its totient is φ = 328620160.

The previous prime is 657240443. The next prime is 657240469. The reversal of 657240448 is 844042756.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 657240448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657240443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2567218 + ... + 2567473.

Almost surely, 2^657240448 is an apocalyptic number.

It is an amenable number.

657240448 is a deficient number, since it is larger than the sum of its proper divisors (652106012).

657240448 is an equidigital number, since it uses as much as digits as its factorization.

657240448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134705 (or 5134693 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The square root of 657240448 is about 25636.7011918460. The cubic root of 657240448 is about 869.4436254194.

The spelling of 657240448 in words is "six hundred fifty-seven million, two hundred forty thousand, four hundred forty-eight".