257426772 has 24 divisors (see below), whose sum is σ = 601279392. Its totient is φ = 85720800.

The previous prime is 257426753. The next prime is 257426773. The reversal of 257426772 is 277624752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257426773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1747 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (25053308).

Almost surely, 2^257426772 is an apocalyptic number.

It is an amenable number.

257426772 is an abundant number, since it is smaller than the sum of its proper divisors (343852620).

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

257426772 is a wasteful number, since it uses less digits than its factorization.

257426772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22039 (or 22037 counting only the distinct ones).

The product of its digits is 329280, while the sum is 42.

The square root of 257426772 is about 16044.5246735452. The cubic root of 257426772 is about 636.1378503456.

The spelling of 257426772 in words is "two hundred fifty-seven million, four hundred twenty-six thousand, seven hundred seventy-two".