2028431 has 2 divisors, whose sum is σ = 2028432. Its totient is φ = 2028430.

The previous prime is 2028413. The next prime is 2028443. The reversal of 2028431 is 1348202.

Together with previous prime (2028413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2028431 - 2¹⁴ = 2012047 is a prime.

It is a super-2 number, since 2×2028431² = 8229064643522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2028401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014215 + 1014216.

It is an arithmetic number, because the mean of its divisors is an integer number (1014216).

2^2028431 is an apocalyptic number.

2028431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028431 is an equidigital number, since it uses as much as digits as its factorization.

2028431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2028431 is about 1424.2299673859. The cubic root of 2028431 is about 126.5863117622.

The spelling of 2028431 in words is "two million, twenty-eight thousand, four hundred thirty-one".