255787884 has 72 divisors (see below), whose sum is σ = 716985360. Its totient is φ = 76233600.

The previous prime is 255787879. The next prime is 255787897. The reversal of 255787884 is 488787552.

255787884 is a `hidden beast` number, since 2 + 557 + 8 + 7 + 8 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 255787884.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18862 + ... + 29450.

It is an arithmetic number, because the mean of its divisors is an integer number (9958130).

Almost surely, 2^255787884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255787884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358492680).

255787884 is an abundant number, since it is smaller than the sum of its proper divisors (461197476).

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

255787884 is a wasteful number, since it uses less digits than its factorization.

255787884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671 (or 10666 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The square root of 255787884 is about 15993.3700013474. The cubic root of 255787884 is about 634.7850008904.

The spelling of 255787884 in words is "two hundred fifty-five million, seven hundred eighty-seven thousand, eight hundred eighty-four".