4028007 has 4 divisors (see below), whose sum is σ = 5370680. Its totient is φ = 2685336.

The previous prime is 4027993. The next prime is 4028009. The reversal of 4028007 is 7008204.

It is a happy number.

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

It is not a de Polignac number, because 4028007 - 2⁷ = 4027879 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028009) 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, 671332 + ... + 671337.

It is an arithmetic number, because the mean of its divisors is an integer number (1342670).

Almost surely, 2^4028007 is an apocalyptic number.

4028007 is a deficient number, since it is larger than the sum of its proper divisors (1342673).

4028007 is a wasteful number, since it uses less digits than its factorization.

4028007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342672.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 4028007 is about 2006.9895365945. The cubic root of 4028007 is about 159.1097300380.

The spelling of 4028007 in words is "four million, twenty-eight thousand, seven".