1916390 has 24 divisors (see below), whose sum is σ = 4013712. Its totient is φ = 656880.

The previous prime is 1916371. The next prime is 1916413. The reversal of 1916390 is 936191.

1916390 = 33² + 34² + ... + 179².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1466 + ... + 2445.

It is an arithmetic number, because the mean of its divisors is an integer number (167238).

2^1916390 is an apocalyptic number.

1916390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1916390 is an abundant number, since it is smaller than the sum of its proper divisors (2097322).

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

1916390 is a wasteful number, since it uses less digits than its factorization.

1916390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932 (or 3925 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1916390 is about 1384.3373866222. The cubic root of 1916390 is about 124.2113547738.

The spelling of 1916390 in words is "one million, nine hundred sixteen thousand, three hundred ninety".