255728073 has 4 divisors (see below), whose sum is σ = 340970768. Its totient is φ = 170485380.

The previous prime is 255728071. The next prime is 255728101. The reversal of 255728073 is 370827552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255728073 - 2¹ = 255728071 is a prime.

It is the 15992-nd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255728071) by changing a digit.

It is a nontrivial repunit in base 15991.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42621343 + ... + 42621348.

It is an arithmetic number, because the mean of its divisors is an integer number (85242692).

Almost surely, 2^255728073 is an apocalyptic number.

It is an amenable number.

255728073 is a deficient number, since it is larger than the sum of its proper divisors (85242695).

255728073 is an equidigital number, since it uses as much as digits as its factorization.

255728073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85242694.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 255728073 is about 15991.5000234500. The cubic root of 255728073 is about 634.7355196760.

The spelling of 255728073 in words is "two hundred fifty-five million, seven hundred twenty-eight thousand, seventy-three".