1819408 has 20 divisors (see below), whose sum is σ = 3733020. Its totient is φ = 856064.

The previous prime is 1819397. The next prime is 1819409. The reversal of 1819408 is 8049181.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 350464 = 1212^2 + 592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1819408.

It is not an unprimeable number, because it can be changed into a prime (1819409) 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, 3073 + ... + 3616.

It is an arithmetic number, because the mean of its divisors is an integer number (186651).

2^1819408 is an apocalyptic number.

It is an amenable number.

1819408 is an abundant number, since it is smaller than the sum of its proper divisors (1913612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1819408 is a wasteful number, since it uses less digits than its factorization.

1819408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714 (or 6708 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1819408 is about 1348.8543286805. The cubic root of 1819408 is about 122.0796756260.

Subtracting from 1819408 its product of nonzero digits (2304), we obtain a square (1817104 = 1348²).

The spelling of 1819408 in words is "one million, eight hundred nineteen thousand, four hundred eight".