278258055 has 16 divisors (see below), whose sum is σ = 450217440. Its totient is φ = 146736128.

The previous prime is 278258053. The next prime is 278258069. The reversal of 278258055 is 550852872.

It is a cyclic number.

It is not a de Polignac number, because 278258055 - 2¹ = 278258053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278257998 and 278258016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278258053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102882 + ... + 105551.

It is an arithmetic number, because the mean of its divisors is an integer number (28138590).

Almost surely, 2^278258055 is an apocalyptic number.

278258055 is a deficient number, since it is larger than the sum of its proper divisors (171959385).

278258055 is a wasteful number, since it uses less digits than its factorization.

278258055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208530.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 278258055 is about 16681.0687607239. The cubic root of 278258055 is about 652.8537680273.

The spelling of 278258055 in words is "two hundred seventy-eight million, two hundred fifty-eight thousand, fifty-five".