1890564 has 24 divisors (see below), whose sum is σ = 4751040. Its totient is φ = 581664.

The previous prime is 1890547. The next prime is 1890571. The reversal of 1890564 is 4650981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5904 + ... + 6215.

It is an arithmetic number, because the mean of its divisors is an integer number (197960).

2^1890564 is an apocalyptic number.

It is an amenable number.

1890564 is an abundant number, since it is smaller than the sum of its proper divisors (2860476).

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

1890564 is a wasteful number, since it uses less digits than its factorization.

1890564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12139 (or 12137 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1890564 is about 1374.9778180029. The cubic root of 1890564 is about 123.6508562098.

The spelling of 1890564 in words is "one million, eight hundred ninety thousand, five hundred sixty-four".