1920090 has 32 divisors (see below), whose sum is σ = 4769280. Its totient is φ = 494144.

The previous prime is 1920089. The next prime is 1920101. The reversal of 1920090 is 900291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (149040).

2^1920090 is an apocalyptic number.

1920090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1920090 is an abundant number, since it is smaller than the sum of its proper divisors (2849190).

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

1920090 is a wasteful number, since it uses less digits than its factorization.

1920090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1920090 is about 1385.6731216272. The cubic root of 1920090 is about 124.2912422281.

It can be divided in two parts, 19200 and 90, that multiplied together give a cube (1728000 = 120³).

The spelling of 1920090 in words is "one million, nine hundred twenty thousand, ninety".