11919090 has 16 divisors (see below), whose sum is σ = 28605888. Its totient is φ = 3178416.

The previous prime is 11919079. The next prime is 11919107. The reversal of 11919090 is 9091911.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 397303 = 11919090 / (1 + 1 + 9 + 1 + 9 + 0 + 9 + 0).

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, 198622 + ... + 198681.

It is an arithmetic number, because the mean of its divisors is an integer number (1787868).

Almost surely, 2^11919090 is an apocalyptic number.

11919090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11919090 is an abundant number, since it is smaller than the sum of its proper divisors (16686798).

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

11919090 is a wasteful number, since it uses less digits than its factorization.

11919090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397313.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 11919090 is about 3452.4035105995. The cubic root of 11919090 is about 228.4271386582.

The spelling of 11919090 in words is "eleven million, nine hundred nineteen thousand, ninety".