1919930 has 16 divisors (see below), whose sum is σ = 3549960. Its totient is φ = 747072.

The previous prime is 1919927. The next prime is 1919947. The reversal of 1919930 is 399191.

It can be written as a sum of positive squares in 4 ways, for example, as 1907161 + 12769 = 1381^2 + 113^2 .

It is a super-2 number, since 2×1919930² = 7372262409800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225 + ... + 2964.

2^1919930 is an apocalyptic number.

1919930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1919930 is a deficient number, since it is larger than the sum of its proper divisors (1630030).

1919930 is a wasteful number, since it uses less digits than its factorization.

1919930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5233.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1919930 is about 1385.6153867506. The cubic root of 1919930 is about 124.2877897596.

The spelling of 1919930 in words is "one million, nine hundred nineteen thousand, nine hundred thirty".