657208442 has 48 divisors (see below), whose sum is σ = 1149839712. Its totient is φ = 279318240.

The previous prime is 657208403. The next prime is 657208459. The reversal of 657208442 is 244802756.

657208442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 657208396 and 657208405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 658688 + ... + 659684.

It is an arithmetic number, because the mean of its divisors is an integer number (23954994).

Almost surely, 2^657208442 is an apocalyptic number.

657208442 is a deficient number, since it is larger than the sum of its proper divisors (492631270).

657208442 is a wasteful number, since it uses less digits than its factorization.

657208442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 657208442 is about 25636.0769619690. The cubic root of 657208442 is about 869.4295119319.

The spelling of 657208442 in words is "six hundred fifty-seven million, two hundred eight thousand, four hundred forty-two".