8428819 has 4 divisors (see below), whose sum is σ = 9632944. Its totient is φ = 7224696.

The previous prime is 8428811. The next prime is 8428867. The reversal of 8428819 is 9188248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8428819 - 2³ = 8428811 is a prime.

It is a super-2 number, since 2×8428819² = 142089979469522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8428811) 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, 602052 + ... + 602065.

It is an arithmetic number, because the mean of its divisors is an integer number (2408236).

Almost surely, 2^8428819 is an apocalyptic number.

8428819 is a deficient number, since it is larger than the sum of its proper divisors (1204125).

8428819 is a wasteful number, since it uses less digits than its factorization.

8428819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204124.

The product of its digits is 36864, while the sum is 40.

The square root of 8428819 is about 2903.2428420647. The cubic root of 8428819 is about 203.5114784439.

The spelling of 8428819 in words is "eight million, four hundred twenty-eight thousand, eight hundred nineteen".