1822399 has 4 divisors (see below), whose sum is σ = 1832760. Its totient is φ = 1812040.

The previous prime is 1822393. The next prime is 1822411. The reversal of 1822399 is 9932281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932281 = 67 ⋅148243.

It is a cyclic number.

It is not a de Polignac number, because 1822399 - 2³ = 1822391 is a prime.

It is a super-2 number, since 2×1822399² = 6642276230402, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822391) 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, 4912 + ... + 5269.

It is an arithmetic number, because the mean of its divisors is an integer number (458190).

2^1822399 is an apocalyptic number.

1822399 is a deficient number, since it is larger than the sum of its proper divisors (10361).

1822399 is a wasteful number, since it uses less digits than its factorization.

1822399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360.

The product of its digits is 7776, while the sum is 34.

The square root of 1822399 is about 1349.9625920743. The cubic root of 1822399 is about 122.1465362756.

The spelling of 1822399 in words is "one million, eight hundred twenty-two thousand, three hundred ninety-nine".