257613630 has 32 divisors (see below), whose sum is σ = 624401568. Its totient is φ = 68016000.

The previous prime is 257613623. The next prime is 257613649. The reversal of 257613630 is 36316752.

It is a junction number, because it is equal to n+sod(n) for n = 257613591 and 257613600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39481 + ... + 45540.

It is an arithmetic number, because the mean of its divisors is an integer number (19512549).

Almost surely, 2^257613630 is an apocalyptic number.

257613630 is an abundant number, since it is smaller than the sum of its proper divisors (366787938).

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

257613630 is a wasteful number, since it uses less digits than its factorization.

257613630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85132.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 257613630 is about 16050.3467252268. The cubic root of 257613630 is about 636.2917306076.

The spelling of 257613630 in words is "two hundred fifty-seven million, six hundred thirteen thousand, six hundred thirty".