257020662 has 8 divisors (see below), whose sum is σ = 514041336. Its totient is φ = 85673552.

The previous prime is 257020661. The next prime is 257020667. The reversal of 257020662 is 266020752.

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

257020662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257020661) 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 3 ways as a sum of consecutive naturals, for example, 21418383 + ... + 21418394.

It is an arithmetic number, because the mean of its divisors is an integer number (64255167).

Almost surely, 2^257020662 is an apocalyptic number.

257020662 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.

257020662 is a wasteful number, since it uses less digits than its factorization.

257020662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42836782.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 257020662 is about 16031.8639590036. The cubic root of 257020662 is about 635.8031559251.

It can be divided in two parts, 2570 and 20662, that added together give a palindrome (23232).

The spelling of 257020662 in words is "two hundred fifty-seven million, twenty thousand, six hundred sixty-two".