1916290 has 16 divisors (see below), whose sum is σ = 3499200. Its totient is φ = 755440.

The previous prime is 1916287. The next prime is 1916293. The reversal of 1916290 is 926191.

It is an interprime number because it is at equal distance from previous prime (1916287) and next prime (1916293).

It is not an unprimeable number, because it can be changed into a prime (1916293) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 640 + ... + 2059.

It is an arithmetic number, because the mean of its divisors is an integer number (218700).

2^1916290 is an apocalyptic number.

1916290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1916290 is a deficient number, since it is larger than the sum of its proper divisors (1582910).

1916290 is a wasteful number, since it uses less digits than its factorization.

1916290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1916290 is about 1384.3012677882. The cubic root of 1916290 is about 124.2091942269.

Subtracting from 1916290 its reverse (926191), we obtain a palindrome (990099).

The spelling of 1916290 in words is "one million, nine hundred sixteen thousand, two hundred ninety".