278707 has 8 divisors (see below), whose sum is σ = 327600. Its totient is φ = 233760.

The previous prime is 278701. The next prime is 278717. The reversal of 278707 is 707872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278707 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (278701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832 + ... + 1117.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2²⁷⁸⁷⁰⁷ is an apocalyptic number.

278707 is a deficient number, since it is larger than the sum of its proper divisors (48893).

278707 is a wasteful number, since it uses less digits than its factorization.

278707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 278707 is about 527.9270782978. The cubic root of 278707 is about 65.3204686827.

The spelling of 278707 in words is "two hundred seventy-eight thousand, seven hundred seven".