1890436 has 12 divisors (see below), whose sum is σ = 3321612. Its totient is φ = 941408.

The previous prime is 1890403. The next prime is 1890467. The reversal of 1890436 is 6340981.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 352836 = 1240^2 + 594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1890398 and 1890407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (276801).

2^1890436 is an apocalyptic number.

It is an amenable number.

1890436 is a deficient number, since it is larger than the sum of its proper divisors (1431176).

1890436 is a wasteful number, since it uses less digits than its factorization.

1890436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1890436 is about 1374.9312710096. The cubic root of 1890436 is about 123.6480655669.

The spelling of 1890436 in words is "one million, eight hundred ninety thousand, four hundred thirty-six".