278057 has 8 divisors (see below), whose sum is σ = 304584. Its totient is φ = 252288.

The previous prime is 278051. The next prime is 278063. The reversal of 278057 is 750872.

It is an interprime number because it is at equal distance from previous prime (278051) and next prime (278063).

It can be written as a sum of positive squares in 4 ways, for example, as 65536 + 212521 = 256^2 + 461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278057 - 2⁴ = 278041 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (278051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803 + ... + 1095.

It is an arithmetic number, because the mean of its divisors is an integer number (38073).

2²⁷⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

278057 is a deficient number, since it is larger than the sum of its proper divisors (26527).

278057 is a wasteful number, since it uses less digits than its factorization.

278057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 278057 is about 527.3111036191. The cubic root of 278057 is about 65.2696490591.

The spelling of 278057 in words is "two hundred seventy-eight thousand, fifty-seven".