1028402 has 4 divisors (see below), whose sum is σ = 1542606. Its totient is φ = 514200.

The previous prime is 1028393. The next prime is 1028411. The reversal of 1028402 is 2048201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2048201 = 31 ⋅66071.

It is an interprime number because it is at equal distance from previous prime (1028393) and next prime (1028411).

It can be written as a sum of positive squares in only one way, i.e., 737881 + 290521 = 859^2 + 539^2 .

It is a super-2 number, since 2×1028402² = 2115221347208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257099 + ... + 257102.

2^1028402 is an apocalyptic number.

1028402 is a deficient number, since it is larger than the sum of its proper divisors (514204).

1028402 is an equidigital number, since it uses as much as digits as its factorization.

1028402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514203.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1028402 is about 1014.1015728220. The cubic root of 1028402 is about 100.9379090968.

The spelling of 1028402 in words is "one million, twenty-eight thousand, four hundred two".