257354394 has 16 divisors (see below), whose sum is σ = 561500640. Its totient is φ = 77986160.

The previous prime is 257354393. The next prime is 257354423. The reversal of 257354394 is 493453752.

It is a super-2 number, since 2×257354394² = 132462568222214472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257354393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949589 + ... + 1949720.

It is an arithmetic number, because the mean of its divisors is an integer number (35093790).

Almost surely, 2^257354394 is an apocalyptic number.

257354394 is an abundant number, since it is smaller than the sum of its proper divisors (304146246).

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

257354394 is a wasteful number, since it uses less digits than its factorization.

257354394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899325.

The product of its digits is 453600, while the sum is 42.

The square root of 257354394 is about 16042.2689791688. The cubic root of 257354394 is about 636.0782260096.

The spelling of 257354394 in words is "two hundred fifty-seven million, three hundred fifty-four thousand, three hundred ninety-four".