278552085 has 32 divisors (see below), whose sum is σ = 510597120. Its totient is φ = 127027008.

The previous prime is 278552083. The next prime is 278552093. The reversal of 278552085 is 580255872.

It is not a de Polignac number, because 278552085 - 2¹ = 278552083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278552083) 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 31 ways as a sum of consecutive naturals, for example, 43074 + ... + 49116.

It is an arithmetic number, because the mean of its divisors is an integer number (15956160).

Almost surely, 2^278552085 is an apocalyptic number.

It is an amenable number.

278552085 is a deficient number, since it is larger than the sum of its proper divisors (232045035).

278552085 is a wasteful number, since it uses less digits than its factorization.

278552085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497.

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

The square root of 278552085 is about 16689.8797179608. The cubic root of 278552085 is about 653.0836398036.

The spelling of 278552085 in words is "two hundred seventy-eight million, five hundred fifty-two thousand, eighty-five".