257700642 has 8 divisors (see below), whose sum is σ = 515401296. Its totient is φ = 85900212.

The previous prime is 257700617. The next prime is 257700647. The reversal of 257700642 is 246007752.

257700642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

257700642 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (257700647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21475048 + ... + 21475059.

It is an arithmetic number, because the mean of its divisors is an integer number (64425162).

Almost surely, 2^257700642 is an apocalyptic number.

257700642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

257700642 is a wasteful number, since it uses less digits than its factorization.

257700642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42950112.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 257700642 is about 16053.0570920308. The cubic root of 257700642 is about 636.3633608545.

The spelling of 257700642 in words is "two hundred fifty-seven million, seven hundred thousand, six hundred forty-two".