4278387 has 4 divisors (see below), whose sum is σ = 5704520. Its totient is φ = 2852256.

The previous prime is 4278383. The next prime is 4278413. The reversal of 4278387 is 7838724.

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

It is not a de Polignac number, because 4278387 - 2² = 4278383 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4278383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713062 + ... + 713067.

It is an arithmetic number, because the mean of its divisors is an integer number (1426130).

Almost surely, 2^4278387 is an apocalyptic number.

4278387 is a deficient number, since it is larger than the sum of its proper divisors (1426133).

4278387 is a wasteful number, since it uses less digits than its factorization.

4278387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426132.

The product of its digits is 75264, while the sum is 39.

The square root of 4278387 is about 2068.4262133323. The cubic root of 4278387 is about 162.3404287604.

The spelling of 4278387 in words is "four million, two hundred seventy-eight thousand, three hundred eighty-seven".