1899428 has 6 divisors (see below), whose sum is σ = 3324006. Its totient is φ = 949712.

The previous prime is 1899421. The next prime is 1899437. The reversal of 1899428 is 8249981.

It can be written as a sum of positive squares in only one way, i.e., 1721344 + 178084 = 1312^2 + 422^2 .

It is not an unprimeable number, because it can be changed into a prime (1899421) by changing a digit.

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 as a sum of consecutive naturals, namely, 237425 + ... + 237432.

It is an arithmetic number, because the mean of its divisors is an integer number (554001).

2^1899428 is an apocalyptic number.

It is an amenable number.

1899428 is a deficient number, since it is larger than the sum of its proper divisors (1424578).

1899428 is a wasteful number, since it uses less digits than its factorization.

1899428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474861 (or 474859 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 1899428 is about 1378.1973733831. The cubic root of 1899428 is about 123.8438026339.

The spelling of 1899428 in words is "one million, eight hundred ninety-nine thousand, four hundred twenty-eight".