1899404 has 12 divisors (see below), whose sum is σ = 3579744. Its totient is φ = 876624.

The previous prime is 1899377. The next prime is 1899419. The reversal of 1899404 is 4049981.

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18212 + ... + 18315.

It is an arithmetic number, because the mean of its divisors is an integer number (298312).

2^1899404 is an apocalyptic number.

It is an amenable number.

1899404 is a deficient number, since it is larger than the sum of its proper divisors (1680340).

1899404 is a wasteful number, since it uses less digits than its factorization.

1899404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36544 (or 36542 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1899404 is about 1378.1886663298. The cubic root of 1899404 is about 123.8432810271.

The spelling of 1899404 in words is "one million, eight hundred ninety-nine thousand, four hundred four".