1428819 has 16 divisors (see below), whose sum is σ = 2292480. Its totient is φ = 773280.

The previous prime is 1428811. The next prime is 1428839. The reversal of 1428819 is 9188241.

It is not a de Polignac number, because 1428819 - 2³ = 1428811 is a prime.

It is a super-2 number, since 2×1428819² = 4083047469522, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428819.

It is not an unprimeable number, because it can be changed into a prime (1428811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1392 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (143280).

2^1428819 is an apocalyptic number.

1428819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1428819 is a deficient number, since it is larger than the sum of its proper divisors (863661).

1428819 is a wasteful number, since it uses less digits than its factorization.

1428819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610.

The product of its digits is 4608, while the sum is 33.

The square root of 1428819 is about 1195.3321714068. The cubic root of 1428819 is about 112.6312936272.

The spelling of 1428819 in words is "one million, four hundred twenty-eight thousand, eight hundred nineteen".