257423346 has 40 divisors (see below), whose sum is σ = 582567084. Its totient is φ = 84952800.

The previous prime is 257423329. The next prime is 257423347. The reversal of 257423346 is 643324752.

It can be written as a sum of positive squares in 2 ways, for example, as 256352121 + 1071225 = 16011^2 + 1035^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 257423346.

It is not an unprimeable number, because it can be changed into a prime (257423347) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8496 + ... + 24228.

Almost surely, 2^257423346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257423346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291283542).

257423346 is an abundant number, since it is smaller than the sum of its proper divisors (325143738).

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

257423346 is a wasteful number, since it uses less digits than its factorization.

257423346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15848 (or 15839 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 257423346 is about 16044.4179077958. The cubic root of 257423346 is about 636.1350282901.

The spelling of 257423346 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, three hundred forty-six".