47278 has 16 divisors (see below), whose sum is σ = 88704. Its totient is φ = 18360.

The previous prime is 47269. The next prime is 47279. The reversal of 47278 is 87274.

47278 is a nontrivial binomial coefficient, being equal to C(308, 2).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47279) 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, 1 + ... + 307.

It is an arithmetic number, because the mean of its divisors is an integer number (5544).

2⁴⁷²⁷⁸ is an apocalyptic number.

47278 is the 307-th triangular number and also the 154-th hexagonal number.

47278 is the 103-rd centered nonagonal number.

47278 is a deficient number, since it is larger than the sum of its proper divisors (41426).

47278 is a wasteful number, since it uses less digits than its factorization.

47278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its digits is 3136, while the sum is 28.

The square root of 47278 is about 217.4350477729. The cubic root of 47278 is about 36.1592737148.

It can be divided in two parts, 47 and 278, that added together give a triangular number (325 = T₂₅).

The spelling of 47278 in words is "forty-seven thousand, two hundred seventy-eight".