657042448 has 20 divisors (see below), whose sum is σ = 1307426860. Its totient is φ = 319641984.

The previous prime is 657042437. The next prime is 657042457. The reversal of 657042448 is 844240756.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 283316224 + 373726224 = 16832^2 + 19332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 657042448.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554343 + ... + 555526.

It is an arithmetic number, because the mean of its divisors is an integer number (65371343).

Almost surely, 2^657042448 is an apocalyptic number.

It is an amenable number.

657042448 is a deficient number, since it is larger than the sum of its proper divisors (650384412).

657042448 is a wasteful number, since it uses less digits than its factorization.

657042448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109914 (or 1109908 counting only the distinct ones).

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

The square root of 657042448 is about 25632.8392496813. The cubic root of 657042448 is about 869.3563072349.

The spelling of 657042448 in words is "six hundred fifty-seven million, forty-two thousand, four hundred forty-eight".