1913644 has 6 divisors (see below), whose sum is σ = 3348884. Its totient is φ = 956820.

The previous prime is 1913641. The next prime is 1913651. The reversal of 1913644 is 4463191.

It is not an unprimeable number, because it can be changed into a prime (1913641) by changing a digit.

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 as a sum of consecutive naturals, namely, 239202 + ... + 239209.

2^1913644 is an apocalyptic number.

It is an amenable number.

1913644 is a deficient number, since it is larger than the sum of its proper divisors (1435240).

1913644 is a wasteful number, since it uses less digits than its factorization.

1913644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478415 (or 478413 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1913644 is about 1383.3452208325. The cubic root of 1913644 is about 124.1519988279.

The spelling of 1913644 in words is "one million, nine hundred thirteen thousand, six hundred forty-four".