1919964 has 24 divisors (see below), whose sum is σ = 4508560. Its totient is φ = 635904.

The previous prime is 1919959. The next prime is 1919987. The reversal of 1919964 is 4699191.

It is a super-2 number, since 2×1919964² = 7372523522592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 1902 + ... + 2730.

2^1919964 is an apocalyptic number.

It is an amenable number.

1919964 is an abundant number, since it is smaller than the sum of its proper divisors (2588596).

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

1919964 is a wasteful number, since it uses less digits than its factorization.

1919964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1027 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 1919964 is about 1385.6276556132. The cubic root of 1919964 is about 124.2885234252.

The spelling of 1919964 in words is "one million, nine hundred nineteen thousand, nine hundred sixty-four".