278473 has 8 divisors (see below), whose sum is σ = 310016. Its totient is φ = 248400.

The previous prime is 278459. The next prime is 278479. The reversal of 278473 is 374872.

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

It is a cyclic number.

It is not a de Polignac number, because 278473 - 2⁹ = 277961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (278479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (38752).

2²⁷⁸⁴⁷³ is an apocalyptic number.

It is an amenable number.

278473 is a deficient number, since it is larger than the sum of its proper divisors (31543).

278473 is a wasteful number, since it uses less digits than its factorization.

278473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735.

The product of its digits is 9408, while the sum is 31.

The square root of 278473 is about 527.7054102433. The cubic root of 278473 is about 65.3021827296.

The spelling of 278473 in words is "two hundred seventy-eight thousand, four hundred seventy-three".