1028286381 has 8 divisors (see below), whose sum is σ = 1373744160. Its totient is φ = 684176432.

The previous prime is 1028286373. The next prime is 1028286401. The reversal of 1028286381 is 1836828201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028286381 - 2³ = 1028286373 is a prime.

It is a super-3 number, since 3×1028286381³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028286341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335175 + ... + 338228.

It is an arithmetic number, because the mean of its divisors is an integer number (171718020).

Almost surely, 2^1028286381 is an apocalyptic number.

It is an amenable number.

1028286381 is a deficient number, since it is larger than the sum of its proper divisors (345457779).

1028286381 is an equidigital number, since it uses as much as digits as its factorization.

1028286381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673915.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1028286381 is about 32066.9047617633. The cubic root of 1028286381 is about 1009.3412627728.

The spelling of 1028286381 in words is "one billion, twenty-eight million, two hundred eighty-six thousand, three hundred eighty-one".