1028158399 has 8 divisors (see below), whose sum is σ = 1039408848. Its totient is φ = 1016938560.

The previous prime is 1028158393. The next prime is 1028158403. The reversal of 1028158399 is 9938518201.

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 1028158399 - 2¹¹ = 1028156351 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 (1028158393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63459 + ... + 77995.

It is an arithmetic number, because the mean of its divisors is an integer number (129926106).

Almost surely, 2^1028158399 is an apocalyptic number.

1028158399 is a deficient number, since it is larger than the sum of its proper divisors (11250449).

1028158399 is a wasteful number, since it uses less digits than its factorization.

1028158399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15305.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 1028158399 is about 32064.9091531537. The cubic root of 1028158399 is about 1009.2993863476.

The spelling of 1028158399 in words is "one billion, twenty-eight million, one hundred fifty-eight thousand, three hundred ninety-nine".