255716420 has 12 divisors (see below), whose sum is σ = 537004524. Its totient is φ = 102286560.

The previous prime is 255716407. The next prime is 255716423. The reversal of 255716420 is 24617552.

It can be written as a sum of positive squares in 2 ways, for example, as 46566976 + 209149444 = 6824^2 + 14462^2 .

It is not an unprimeable number, because it can be changed into a prime (255716423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6392891 + ... + 6392930.

It is an arithmetic number, because the mean of its divisors is an integer number (44750377).

Almost surely, 2^255716420 is an apocalyptic number.

255716420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255716420 is an abundant number, since it is smaller than the sum of its proper divisors (281288104).

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

255716420 is a wasteful number, since it uses less digits than its factorization.

255716420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12785830 (or 12785828 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 255716420 is about 15991.1356694889. The cubic root of 255716420 is about 634.7258783341.

The spelling of 255716420 in words is "two hundred fifty-five million, seven hundred sixteen thousand, four hundred twenty".