1911940090 has 32 divisors (see below), whose sum is σ = 3600339840. Its totient is φ = 729647424.

The previous prime is 1911940039. The next prime is 1911940099. The reversal of 1911940090 is 900491191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1911940099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80841 + ... + 101779.

It is an arithmetic number, because the mean of its divisors is an integer number (112510620).

Almost surely, 2^1911940090 is an apocalyptic number.

1911940090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1911940090 is a deficient number, since it is larger than the sum of its proper divisors (1688399750).

1911940090 is a wasteful number, since it uses less digits than its factorization.

1911940090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21366.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 1911940090 is about 43725.7371578799. The cubic root of 1911940090 is about 1241.1513954273.

The spelling of 1911940090 in words is "one billion, nine hundred eleven million, nine hundred forty thousand, ninety".