255391398 has 12 divisors (see below), whose sum is σ = 553348068. Its totient is φ = 85130460.

The previous prime is 255391387. The next prime is 255391403. The reversal of 255391398 is 893193552.

255391398 is a `hidden beast` number, since 2 + 553 + 9 + 1 + 3 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7094188 + ... + 7094223.

It is an arithmetic number, because the mean of its divisors is an integer number (46112339).

Almost surely, 2^255391398 is an apocalyptic number.

255391398 is an abundant number, since it is smaller than the sum of its proper divisors (297956670).

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

255391398 is a wasteful number, since it uses less digits than its factorization.

255391398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14188419 (or 14188416 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 255391398 is about 15980.9698704428. The cubic root of 255391398 is about 634.4568468026.

The spelling of 255391398 in words is "two hundred fifty-five million, three hundred ninety-one thousand, three hundred ninety-eight".