4047278 has 4 divisors (see below), whose sum is σ = 6070920. Its totient is φ = 2023638.

The previous prime is 4047271. The next prime is 4047283. The reversal of 4047278 is 8727404.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4047271) 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 as a sum of consecutive naturals, namely, 1011818 + ... + 1011821.

It is an arithmetic number, because the mean of its divisors is an integer number (1517730).

Almost surely, 2^4047278 is an apocalyptic number.

4047278 is a deficient number, since it is larger than the sum of its proper divisors (2023642).

4047278 is a wasteful number, since it uses less digits than its factorization.

4047278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023641.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 4047278 is about 2011.7847797416. The cubic root of 4047278 is about 159.3630667984.

The spelling of 4047278 in words is "four million, forty-seven thousand, two hundred seventy-eight".