263728493 has 8 divisors (see below), whose sum is σ = 317267520. Its totient is φ = 214155360.

The previous prime is 263728471. The next prime is 263728499. The reversal of 263728493 is 394827362.

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

It is a cyclic number.

It is not a de Polignac number, because 263728493 - 2¹² = 263724397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263728499) 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, 991328 + ... + 991593.

It is an arithmetic number, because the mean of its divisors is an integer number (39658440).

Almost surely, 2^263728493 is an apocalyptic number.

It is an amenable number.

263728493 is a deficient number, since it is larger than the sum of its proper divisors (53539027).

263728493 is a wasteful number, since it uses less digits than its factorization.

263728493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982947.

The product of its digits is 435456, while the sum is 44.

The square root of 263728493 is about 16239.7196096484. The cubic root of 263728493 is about 641.2868743987.

The spelling of 263728493 in words is "two hundred sixty-three million, seven hundred twenty-eight thousand, four hundred ninety-three".