1923640 has 16 divisors (see below), whose sum is σ = 4328280. Its totient is φ = 769440.

The previous prime is 1923613. The next prime is 1923653. The reversal of 1923640 is 463291.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24006 + ... + 24085.

2^1923640 is an apocalyptic number.

1923640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1923640 is an abundant number, since it is smaller than the sum of its proper divisors (2404640).

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

1923640 is a wasteful number, since it uses less digits than its factorization.

1923640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48102 (or 48098 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1923640 is about 1386.9534959760. The cubic root of 1923640 is about 124.3677945878.

The spelling of 1923640 in words is "one million, nine hundred twenty-three thousand, six hundred forty".