4028631 has 4 divisors (see below), whose sum is σ = 5371512. Its totient is φ = 2685752.

The previous prime is 4028621. The next prime is 4028641. The reversal of 4028631 is 1368204.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (4028621) and next prime (4028641).

It is a cyclic number.

It is not a de Polignac number, because 4028631 - 2⁵ = 4028599 is a prime.

It is a super-2 number, since 2×4028631² = 32459735468322, which contains 22 as substring.

It is a D-number.

4028631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028621) 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, 671436 + ... + 671441.

It is an arithmetic number, because the mean of its divisors is an integer number (1342878).

Almost surely, 2^4028631 is an apocalyptic number.

4028631 is a deficient number, since it is larger than the sum of its proper divisors (1342881).

4028631 is a wasteful number, since it uses less digits than its factorization.

4028631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342880.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4028631 is about 2007.1449872892. The cubic root of 4028631 is about 159.1179457921.

The spelling of 4028631 in words is "four million, twenty-eight thousand, six hundred thirty-one".