1028950919 has 4 divisors (see below), whose sum is σ = 1030195944. Its totient is φ = 1027705896.

The previous prime is 1028950873. The next prime is 1028950921. The reversal of 1028950919 is 9190598201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9190598201 = 503 ⋅18271567.

It is a cyclic number.

It is not a de Polignac number, because 1028950919 - 2²⁴ = 1012173703 is a prime.

It is a super-2 number, since 2×1028950919² = 2117479987421889122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028950919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028950969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621272 + ... + 622925.

It is an arithmetic number, because the mean of its divisors is an integer number (257548986).

Almost surely, 2^1028950919 is an apocalyptic number.

1028950919 is a deficient number, since it is larger than the sum of its proper divisors (1245025).

1028950919 is an equidigital number, since it uses as much as digits as its factorization.

1028950919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245024.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 1028950919 is about 32077.2648304060. The cubic root of 1028950919 is about 1009.5586474744.

The spelling of 1028950919 in words is "one billion, twenty-eight million, nine hundred fifty thousand, nine hundred nineteen".