1880990 has 16 divisors (see below), whose sum is σ = 3430080. Its totient is φ = 742560.

The previous prime is 1880971. The next prime is 1880993. The reversal of 1880990 is 990881.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1880990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880993) 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 in 7 ways as a sum of consecutive naturals, for example, 401 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (214380).

2^1880990 is an apocalyptic number.

1880990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1880990 is a deficient number, since it is larger than the sum of its proper divisors (1549090).

1880990 is a wasteful number, since it uses less digits than its factorization.

1880990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1880990 is about 1371.4918884193. The cubic root of 1880990 is about 123.4417762232.

The spelling of 1880990 in words is "one million, eight hundred eighty thousand, nine hundred ninety".