1028407 has 4 divisors (see below), whose sum is σ = 1050336. Its totient is φ = 1006480.

The previous prime is 1028393. The next prime is 1028411. The reversal of 1028407 is 7048201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7048201 = 157 ⋅44893.

It is a cyclic number.

It is not a de Polignac number, because 1028407 - 2¹¹ = 1026359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028437) 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 in 3 ways as a sum of consecutive naturals, for example, 10894 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (262584).

2^1028407 is an apocalyptic number.

1028407 is a deficient number, since it is larger than the sum of its proper divisors (21929).

1028407 is an equidigital number, since it uses as much as digits as its factorization.

1028407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21928.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1028407 is about 1014.1040380553. The cubic root of 1028407 is about 100.9380726803.

The spelling of 1028407 in words is "one million, twenty-eight thousand, four hundred seven".