1916411890 has 8 divisors (see below), whose sum is σ = 3449541420. Its totient is φ = 766564752.

The previous prime is 1916411881. The next prime is 1916411897. The reversal of 1916411890 is 981146191.

It can be written as a sum of positive squares in 2 ways, for example, as 1913450049 + 2961841 = 43743^2 + 1721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1916411897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95820585 + ... + 95820604.

Almost surely, 2^1916411890 is an apocalyptic number.

1916411890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1916411890 is a deficient number, since it is larger than the sum of its proper divisors (1533129530).

1916411890 is a wasteful number, since it uses less digits than its factorization.

1916411890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191641196.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 1916411890 is about 43776.8419372618. The cubic root of 1916411890 is about 1242.1182770750.

The spelling of 1916411890 in words is "one billion, nine hundred sixteen million, four hundred eleven thousand, eight hundred ninety".