257536380 has 24 divisors (see below), whose sum is σ = 721102032. Its totient is φ = 68676352.

The previous prime is 257536369. The next prime is 257536387. The reversal of 257536380 is 83635752.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257536387) 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 7 ways as a sum of consecutive naturals, for example, 2146077 + ... + 2146196.

It is an arithmetic number, because the mean of its divisors is an integer number (30045918).

Almost surely, 2^257536380 is an apocalyptic number.

257536380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257536380 is an abundant number, since it is smaller than the sum of its proper divisors (463565652).

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

257536380 is a wasteful number, since it uses less digits than its factorization.

257536380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292285 (or 4292283 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 257536380 is about 16047.9400547235. The cubic root of 257536380 is about 636.2281231421.

The spelling of 257536380 in words is "two hundred fifty-seven million, five hundred thirty-six thousand, three hundred eighty".