257882780 has 12 divisors (see below), whose sum is σ = 541553880. Its totient is φ = 103153104.

The previous prime is 257882767. The next prime is 257882791. The reversal of 257882780 is 87288752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6447050 + ... + 6447089.

It is an arithmetic number, because the mean of its divisors is an integer number (45129490).

Almost surely, 2^257882780 is an apocalyptic number.

257882780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257882780 is an abundant number, since it is smaller than the sum of its proper divisors (283671100).

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

257882780 is a wasteful number, since it uses less digits than its factorization.

257882780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12894148 (or 12894146 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 257882780 is about 16058.7290904355. The cubic root of 257882780 is about 636.5132487929.

It can be divided in two parts, 2578 and 82780, that added together give a palindrome (85358).

The spelling of 257882780 in words is "two hundred fifty-seven million, eight hundred eighty-two thousand, seven hundred eighty".